Question

How do you solve `3x +4y = 15` and `3x + 2y = 12`?

Answer 1

`x=3,y=3/2`

Explanation:

Multiplying the second equation by`-1` and adding to the first we get
`2y=3` so `y=3/2`
plugging this in the second equation

`3x+3=12`
so
`3x=9`
`x=3`