Binary linear equations 2x-5y plus 3 equals 0ax-y = 7
2x-5y+3=0---(1)
ax-y=7--------(2)
Y = ax-7 is obtained from (2) and substituted by (1)
2x-5ax+35+3=0,x=-38/(2-5a)
Substituting x = - 38 / (2-5A) into y = ax-7, y = - (14 + 3a) / (2-5A)
The solution is as follows
x=-38/(2-5a)
y=-(14+3a)/(2-5a)
RELATED INFORMATIONS
- 1. The solution is 0.5 out of 6
- 2. Solution ratio: 1 / 2: 1 / 4: X
- 3. (1.25 + x): 0.25 = x: 1.6 solution ratio
- 4. 4 / x = 5 / 80 7.2:12 + 9 / 1: x 2.5 + 6 / 15.6:2.88 + 2.6: X solution ratio
- 5. 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio) 6.5: x = 0.5:4 X: 0.42 = 7:21 1 / 8:1 / 6 = 1 / 10: x 6 / 2.5 = x / 3 3 / 2:1 / 3 = x: 8 x: 9 / 2 = 1 / 3:2 (solution ratio)
- 6. Solution ratio (X: 12 = 0.5:1 / 3)
- 7. The solution ratio is 2.25 of x = 3.75 of 2, 11 of 12:5 of 4 = 35 of 36:x
- 8. List the proportions according to the conditions, and find out that the ratio of 8 / 9 to X is equal to 6 and the ratio of 3 / 4 to 9 List the proportion according to the condition and solve the proportion The ratio of eight ninths to X is equal to the ratio of six to three fourths By 9:00
- 9. The ratio of X to 3 / 4 is equal to the ratio of 8 to 1.2
- 10. The ratio of 4.5 to X is equal to the ratio of 9 to 0.4
- 11. A piece of iron wire is m decimeter long. It is used to form a square and a circle. The square area is () A. 1 / 2 B.2 times C. π / 4 D.4 π times
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- 14. In the bivariate linear equation x + 6y-4 = 0, when x is equal to 4, how much is y; when y = - 1, how much is x?
- 15. Bivariate linear equation: X / 3-y / 4 = x / 2 + Y / 3-10 = 3 (with process) There is another problem: when solving the equations {ax + by = 26, the correct solution is {x = 4) cx+y=6 y=-2 Because Xiao Ming wrongly wrote C, the solution is {x = 7} y=3 The correct values of Qiu a, B, C When {ax + by = 26 CX + y = 6, {x = 4, y = - 2 And the above question!
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- 17. Given the first-order function y = KX + B, when 0 ≤ x ≤ 2, the value range of the corresponding function value y is - 4 ≤ y ≤ 8, then the value of KB is______ .
- 18. On the function y = KX + B (k, B are not equal to 0 constant), the following statement is correct () A. Y is proportional to X. B. y is proportional to KX. C. y is proportional to x + B. D. y-b is proportional to X
- 19. When - 3 ≤ x ≤ 1, the corresponding value of Y is 1 ≤ y ≤ 9, then the value of KB is 1______ .
- 20. The first-order function y = KX + B, when x = 4, y = 9; when x = 6, y = 3, what is k What is the value of y when x = 1