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

$y=3/5$