Question

How do you solve the system using the elimination method for 5x+4y=12 and 7x-6y=40?

Answer 1

I found:
`x=4`
`y=-2`

Explanation:

You can multiply the first equation by `6` and the secod by `4` to get:
`{30x+24y=72`
`{28x-24y=160` add them:
`58x=232`
`x=4`
Substitute this back into the first equation:
`20+4y=12`
`y=-2`