If the square of the equation x minus x parts x plus 1 minus 3x parts 1 equals 3x parts 1 equals 3x parts x minus 3 parts x plus K has an increasing root, find the increasing root of the equation and the value of K

If the square of the equation x minus x parts x plus 1 minus 3x parts 1 equals 3x parts 1 equals 3x parts x minus 3 parts x plus K has an increasing root, find the increasing root of the equation and the value of K

Multiply both sides by 3x (x-1)
3(x+1)-(x-1)=x(x+k)
If the root is added, the common denominator is 0
So x = 0, x = 1
X=0
Substituting 3 (x + 1) - (x-1) = x (x + k)
3+1=0
Not established
X=1
Substituting 3 (x + 1) - (x-1) = x (x + k)
6-0=1+k
So k = 5
3x-20%x=17.92
3x-0.2x=17.92
2.8x=17.92
x=17.92/2.8
x=6.4
20%=0.2
If 20% is converted to 0.2, 3x-0.2x = 17.92, that is, 2.8x = 17.92, x = 6.4
(3-20%)x=17.92
2.8x=17.92
x=17.92/2.8
x=6.4
How is the formula derived,
Let loga (b) = x, then a ^ x = B,
Taking the logarithm of C (c > 0 and C ≠ 1) as the base on both sides, logC (a ^ x) = logC (b),
That is, xlogc (a) = logC (b), (x = logC (b) / logC (a),
So loga (b) = logC (b) / logC (a)
It is known that the solutions of the equations 3x-2m + 1 = 0 and 2-m = 2x about X are opposite to each other. Try to find the solutions of these two equations and the value of M
3x-2m + 1 = 0, solution: x = 2m − 13, 2-m = 2x, solution: x = 2 − m2, according to the Title Meaning: 2m − 13 + 2 − M2 = 0, denominator: 4M-2 + 6-3m = 0, solution: M = - 4, the solutions of the two equations are - 3, 2.5
2.5 times 4 + 1.3x equals 12.6 by equation
2.5X4+1.3x=12.6 10+1.3x=12.6 1.3x=12.6-10 1.3x=2.6 x=2
2.5x4+1.3x=12.6
10+1.3x=12.6
1.3x=2.6
X=2
2.5x4+1.3x=12.6
10+1.3x =12.6
1.3x =12.6-10
1.3x =2.6
X = 2.6 divided by 1.3
x =2
4 () 4 △ 47, take 47 as 50 test quotient, quotient 8, but it is small, need to change quotient 9?
4 () 4 △ 47, take 47 as 50 test quotient, quotient 8, but if it is small, it needs to be changed to quotient 9
The solutions of the equations x-2m = - 3x + 4 and 2-m = x are opposite to each other. (1) find the value of M; (2) find the solutions of the two equations
(1) From x-2m = - 3x + 4, we get: x = 12m + 1 (2 points) according to the meaning of the question: 12m + 1 + 2-m = 0, the solution is: M = 6; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp (6 points) (2) from M = 6, the solution of the equation x-2m = - 3x + 4 is x = 12 × 6 + 1 = 3 + 1 = 4 (8 points) the solution of equation 2-m = x is x = 2-6 = - 4 (10 points)
How to solve the equation that 3x multiplied by 4 / 5 equals 16
3x times 4 / 5 = 16 times 5 on both sides
12x=80
x=80/12
x=20/3
1. A, B and C went on an outing and ate "cold dog" together. When each of the three students ate 5 sticks, a paid 8 sticks and B paid 7 sticks, but they didn't pay. After eating, they calculated the number of sticks they ate and took out 15 yuan. How much should a pay? How much should b get?
2. A fruit shop buys a batch of apples and sets the price according to 30% of the profit. After 70% of the apples are sold, in order to sell them out as soon as possible, all the remaining apples are sold at a discount. What is the profit margin of the store after the sale?
1. If this is arranged and combined, it will be very complicated. Then there are many kinds of algorithms and results
2. Suppose you are the fruit of X Yuan
1.3x is the price you ordered. 70% of the price is 1.3x * 0.7 = 0.91x
The remaining 30% is 1.3x * 0.5 = 0.65x * 0.3 = 0.195x
In this way, we get 0.91x + 0.195x = 1.105x. Finally, 0.105x is profitable, which is 10.5%
It is known that the solution of the equation 3x-2m = 4 about X is x = m, then the value of M is______ .
∵ x = m, ∵ 3m-2m = 4, the solution is m = 4