![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
Solution equation: 36 = x (20-x)
36=x(20-x)
36=20x-x^2
x^2-20x+36=0
(x-2)(x-18)=0
x=2,18
Solving equation (X-8) + x = 36
(x-8)+x=36
x+x=36+8
2x=44
x=22
Solution equation: X-5 / 2 * (X-15) = 36 X-5 / 2 * (X-15) = 36
The equation X-5 / 2 * (X-15) = 36 is multiplied by 5 on both sides
5x-2*(x-15)=180
That is, 5x-2x + 30 = 180
3x=150
The solution is x = 50
Solving two problems of equation: X of 12 + X of 15 = 36, X of 6 = x of 10 = 2
Good work, quick work
12 x + 15 x = 36 6 x-4 = 10 x = 2 these two questions are separated
12 x + 15 x = 36, multiply both sides by 60
5X+4X=36X60
9X=36X60
X=4X60=240
6 x-4-10 x = 2
6 X-10 x = 6, multiply both sides by 30
5X-2X=180
3X=180
X=60
On four character idioms with two numbers
Three or four, three or two minds, one mind, seven up and eight down, a hundred shots, a thousand troops, nine to one
If the circumference angle of a 4 cm long string is 135 degrees, the radius of the circle is
It is known that the circular angle of a 4-long string is 135 degrees, then the radius of the string and the two ends connected with the center of the circle form a right triangle, and the string is hypotenuse
R²+R²=4²
R=2√2
The diameter of the circle is 2R = 4 √ 2
Simple calculation of 2 / 5x = 1 and 1 / 5
Simple calculation of 2 / 5x = 1 and 1 / 5
2x/5=6/5;
2x=6;
x=3;
I'm very glad to answer your questions. Skyhunter 002 will answer your questions
If you don't understand this question, you can ask,
It is known that the length of one side of a parallelogram is 14. Among the following groups of numbers ()
A. 10 and 16b. 12 and 16C. 20 and 22d. 10 and 40
As shown in the figure, it can be solved in △ AOB, assuming AB = 14, then 12 (AC + BD) > AB, and for options a, B, C, D, it is obvious that only C is in line with the meaning of the question, so the question is C
25 times 20-x} = 30 times 15 to solve the equation
25(20-x)=30*15
500-25x=450
500-450=25x
50=25x
x=2
If the symmetry axis of the ellipse is the coordinate axis, the sum of the length of the major axis and the length of the minor axis is 18, and the focal length is 6, then the equation of the ellipse is ()
A. X29 + y216 = 1b. X225 + y216 = 1C. X225 + y216 = 1 or x216 + y225 = 1D
Let the major and minor half axes of the ellipse be a and B respectively, then 2 (a + b) = 18, that is, a + B = 9, ①, from the focal length of 6, we get C = 3, then A2-B2 = C2 = 9, ②, from ① we get a = 9-b, ③ into ② we get: (9-b) 2-b2 = 9, simplify to 81-18b = 9, solve to B = 4, and substitute B = 4 into ①, solve to a = 5, so the equation of the ellipse is: X225 + y216 = 1 or x216 + y225 = 1
RELATED INFORMATIONS
- 1. 8 less than x 6 equations plus stars
- 2. Estimate which restaurant is crowded. Why, restaurant a has 30 people, 8 meters in length and 5 meters in width, and restaurant B has 50 people, 7 meters in length and 7 meters in width
- 3. There is a pile of coal in the canteen, which weighs 1.78 tons. After burning for a week, there is still 0.38 tons left. How many tons do you burn every day
- 4. (98-x) + 3 = x-3, how to solve the equation
- 5. How to solve the equation of 2 / 3-x = 4 / 5
- 6. 1. Solve the following equation and test. X + 0.3 = 1.83 + x = 5.4x-1.5 = 4x-6 = 7.6
- 7. Less than 4 / 5 of a number, 7 / 8 is 1 / 48 of 6. Find the number
- 8. How to solve the equation 41-x = 4 (14-x)
- 9. The difference between X and 3.2 is 4.8?
- 10. As shown in the figure, one end of the light rod with length L = 0.5m is fixed with a small ball with mass m = 0.1kg, and the other end is fixed on the rotation axis O. the small ball rotates uniformly on the horizontal plane around the axis, and the light rod turns 30 degrees every 0.1s. (π ^ 2 = 10) (1) try to find the centripetal acceleration of the small ball. (2) centripetal force of the small ball
- 11. The difference between 8 times of a number and 2,4 is exactly 12. What is the number
- 12. There is a number 512 more than the difference between 56 and 38. What's the number?
- 13. 45.8 is 2.65 less than 5.1 times of a number
- 14. If you buy 4 batteries of No. 5, you will pay 8.5 yuan and get 0.1 yuan back. Suppose the price of each battery is x yuan. According to the equation, how much is x equal to
- 15. Divide both sides of the equation 2 (x-1) = 3 (x-1) by X-1 at the same time to get 2 = 3. The reason for the error is that a. The equation itself is wrong. B. The equation has no solution. C. the two sides of the equation divided by 0 D.2 (x-1) is less than 3 (x-1)
- 16. I would like to thank you very much. Please list the equation, Fengrun department store has priced a pair of leather shoes at 165 yuan. If you sell them at 10% discount, you can still make a profit of 10%. What is the purchase price of leather shoes? In order to attract customers, all the goods are sold at 20% discount. It is known that the purchase price of a certain kind of tourist shoes is 60 yuan. After 20% discount, the profit margin is 40%. How much is the price of this kind of shoes? If a certain commodity is sold at a discount in the next season, it will lose 25 yuan if it is sold at a 25% discount, while it will earn 20 yuan if it is sold at a 10% discount. How much is the price of this commodity? The retail price of a certain commodity is 900 yuan per piece. In order to adapt to the market competition, the store decided to reduce the price by 10% of the selling price and sell it at a profit of 48 yuan, still 20% vitality. How much is the purchase price of this product?
- 17. How to solve the equation X-1 / 4x = 60? To process, quarter means quarter.
- 18. If the equation 9 ^ x + (4 + a) * 3 ^ x + 4 = 0 about X has real roots, find the value range of A Using the method of separating variables Don't think of it as a quadratic equation with one variable of 3 ^ X. I'll do that. I'll separate variables
- 19. Solving the equation 4 Λ X - (a + 1) × 6 Λ x = (2a Λ 2-A) × 9 Λ x with respect to X
- 20. 2^(4x+1)-17*4^x+8=0