Question

x+2y = - 1
2х - Зу = 12 solve it substitution method​

Answer 1

x + 2y = -1 -----(1)

2x - 3y = 12 -------(2)

In equation (1),

x = -1-2y

Put, x = -1-2y in equation (2)

2(-1-2y)-3y = 12

- 2 - 4y - 3y = 12

-2 - 7y = 12

-7y = 12 + 2

-7y = 14

y = -14/7

y = -2

Put y = -2 in equation (1)

x + 2(-2) = -1

x + (-4) = -1

x - 4 = -1

x = -1+4

x = 3

Therefore, x = 3 and y = -2