Question

x + 3y = 50
2x + y =120

Answer 1

x+3y=50
2x+y=120

x=50-3y

2(50-3y)+y=120
100-6y+y=120
-5y=120-100
-5y=20 (-1)
5y=-20
y=-20÷5
y=-4

x+3y=50
x+3(-4)=50
x-12=50
x=50+12
X=62