Math, asked by mithun8953, 1 year ago

y=2x -7 and 2x +3y by using substitution method

Answers

Answered by sanjeev7883
0
7 = 2x- y -----(1) and 2x + 3y = 0 -------(2)

from 1 & 2 equation

2x-y = 7
2x+3y =0. ( sin change)
- - -
____________
0 - 4y = 7
_____________

y = 7/4
put the value equation (2)

2x + 3Γ— 7/4 = 0
2x + 21/4 = 0
2x = - 21/4
x = -21/8
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