Question

How do you solve by substitution `5x - 4y = 9` and `x - 2y = -3`?

Answer 1

I found:
`x=5`
`y=4`

Explanation:

Collect `x` from the second equation:
`x=2y-3`
Substitute for `x` into the first equation:
`5(2y-3)-4y=9`
`10y-15-4y=9`
`6y=24`
`y=4`
Substitute this back into the second equation:
`x=8-3=5`