Question

How do solve the following linear system?: `y = 5x - 7, y = 4x + 4`?

Answer 1

Notice that they both have `y` by itself, so if you set them equal to each other you can solve for x. This makes sense if you consider that `y` has the same value, and must be equal to itself.

Explanation:

`y=5x-7 and y=4x+4`
`5x-7=4x+4`
Subtract `4x` from both sides
`x-7=4`
Add 7 to both sides
`x=11`
`5(11)-7=48=4(11)+4`