Question

How do you solve y = 2x and 3x - 2y = -2?

Answer 1

`x=2,y=4`

Explanation:

It's a system of 2 equations with 2 unknown numbers. Let's first put all x and y on the left.
#y-2x=0, 3x-2y=-2#
Now you have to eliminate y in the second equation, using the first.
#y-2x=0, 3x-2y+2*(y-2x)=-2+2*0#
We have :
#y-2x=0, -x=-2 <=> x=2#
Finally replace x by its value.
`y-2*2=0 <=> y=4`