The Y-coordinate of the solution of the system

{x+y=3
{-3x+2y=-19

the answer is -2

how?

I've done everything to try to solve!

{x+y=3 ............(1)

{-3x+2y=-19 ...........(2)

Solve by elimination.

Multiply (1) by 3 and add to (2) in order to eliminate x:

3x+3y=9 ..........3(1)
-3x+2y=-19 .......(2)
Add together
0x+5y=-19+9=-10
Solve for y:
y=-10/5 = -2