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If the values of X and y satisfy 3x-y = 7,2x + 3Y = 1, y = KX + 9, then the value of K is equal to K_______
3x-y=7,
The solution is y = - 2x, y = 1
Substitute y = KX + 9 to get
-1=2k+9
k=-5
If 2 / x = 3 / y = 4 / Z is not equal to 0, then what is 2x + 3Y of Z?
Given that the solution of the equation X-2 / 2x + M = 3 about X is a positive number, what is the value range of X?
x/2=y/3 =》y=3/2x
x/2=z/4 =》z=2x
（2x+3y）/z
=（2x+9/2x）/2x
=13/4
If X-Y is not equal to 0, 2x-3y = 0, then the value of fraction (10x-11y) / (X-Y) is ()?
(10x-11y)/(x-y)
=[(8x-8y)+(2x-3y)]/(x-y)
=8+(2x-3y)]/(x-y)
=8+0
=8
RELATED INFORMATIONS
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- 3. In a ratio, the ratio of two ratios is equal to 3. This ratio is 12 and 8. This ratio is 8 In a ratio, the ratio of two ratios is equal to 3, and the ratio is 12 and 8. This ratio is a process
- 4. When x equals (), the ratio of one-third to X is exactly the smallest sum
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- 7. 9x-7 / y = 0 (x, y is not equal to 0), X and y are proportional to (), why?
- 8. If x equals three fourths of Y, then what is y equal to than x
- 9. If three-quarters of x equals two-thirds of Y, then x: y = what
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- 12. () / 8 = 12 ratio () = 0.75 = 3 of what number = () (fill in percentage)
- 13. Solution ratio 5:8 = 40: X 0.4:1.5 = x: 2.50.2: x = 4:40% x = 1:4:1:4 = 3:8 10: 1 / 5 = 20.5:0.5
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- 16. List the proportions according to the following conditions, and the ratio of the solution proportion 45 and X is equal to the ratio of 25 and 8. The two external terms are 24 and 18, and the two internal terms are x and 36
- 17. The ratio of 4.5 to X is equal to the ratio of 9 to 0.4
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- 20. The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x