Question

How do you solve `2x-6y=40` and `7x+60=y` using substitution?

Answer 1

`x=-10` and `y=-10`

Explanation:

As `7x+60=y`, we can write `2x-6y=40` by substituting value of `y` as

`2x-6(7x+60)=40`

or `2x-42x-360=40`

or `-40x=40+360=400`

Hence `x=400/-40=-10`

and `y=7xx(-10)+60=-10`