Question

(2x - y = 4
8x + y = -9
Solutions to the equation?

Answer 1

x=
`-(1)/(2)`, y = -5

Explanation:

Given:

Equation 1:
`2x-y=4`

Equation 2:
`8x+y= -9`

Adding Equation 1 and 2 we get

`(2x-y=4)+(8x+y=-9)\\`

`10x=-5`

`x= -(5)/(10)=-(1)/(2)`

Now Substituting value of x=
`(1)/(2)` in Equation 1 we get

`-(2)/(2)-y = 4 \\-1-y=4\\-y=5\\y=-5`