Question

How do you solve the system `x+6y=-1, 5x+7y=-5` using the substitution method?

Answer 1

`x=-1`
`y=0`

Explanation:

`x+6y=-1`
`x=-6y-1`

`5x+7y=-5`

`5(-6y-1)+7y=-5`
`-30y-5+7y=-5`
`-23y=0`
`y=0`

`x=-6y-1`
`x=-6(0)-1`
`x=-1`