Answer:
10x-2y=16
we simplify by 2→5x-y=8
5x-y=8
5x+3y=-12
per substitution:
5x-y=8→-y=8-5x
we replace y in the equation 5x+3y=-12
5x-3(8-5x)=-12
5x-24+15x=-12
20x=-12+24
20x=12
x=12/20=3/5
we calculate y:
10x-2y=16
10*3)/5 - 2y= 16
30/5 -2y =16
6-2y=16
-2y=16-6
-y=5
y=-5
solution (3/5;-5)