x-5y=-4....(1)
3x-y=16....(2)
From Eqn (1)
x-5y=-4
Make x the subject
x=5y-4...(3)
Put Eqn(3) into Eqn(2)
3(5y-4)-y=16
15y-12-y=16
14y-12=16
14y=16+12
14y=28
y=28/14
y=2
Put y=2 into Eqn(3)
Eqn(3):x=5y-4
With y=2 :x=5(2)-4
x=10-4
x=6
Hence x=6 and y=2
