Question

What is the value of y in the following system?

4x - 10y = -3

12x + 5y = 12

Answer 1

Y=3/5

First, set it up so they cancel. I recommend multiplying the second equation by 2, getting

`4x-10y=-3`

`24x+10y=24`

add them together, and you get

`28x=21`

so

`x=3/4`

then, you plug x into one of the equations (first because it's easier) and get

`3-10y=-3`

so

`-10y=-6`

and

`y=3/5`