4x - 3 = 3x + y = x - y = 3, 3x + y = 2y + 5x - 12

Answer 1

4x - 3 = 3x + y ... x-y = 3
3x + y = 2y + 5x - 12 ... 2x+y = 12
so, solve
2x+y = 12
x-y = 3
add to get
3x = 15
x = 5
y = 2

Answer 2

Thanks