Question

X+4y=10 and 3x-y=-9 find the value of x/y

Answer 1

`x = 10 - 4y.....(3)`

I WILL SOVE BY SUBSTITUTION.

`3(10 - 4y) - y = - 9 \\ 30 - 12y - y = - 9 \\ - 13y = -9 - 30 \\ - 13y = - 39 \\ ( - 13y)/( - 13) = ( - 39)/( - 13) \\ y = 3 \\`

`x= 10 - 4(3) \\ x = 10 - 12 \\ x = - 2`

we have (-2,3)

ATTACHED IS THE SOLUTION