x+y=8
x=8-y
(x+y)/4=2
(x+y)/4+144-18y=x+y
x+y + 576 - 72y=4x+4y
x+y-72y-4x-4y =-576
-3x-75y=-576
3x+75y=576
x+25y= 192
x = 192 - 25y
x = 192 - 200 - 25x
26x = -8
x+y=8
x=8-y
(x+y)/4=2
(x+y)/4+144-18y=x+y
x+y + 576 - 72y=4x+4y
x+y-72y-4x-4y =-576
-3x-75y=-576
3x+75y=576
x+25y= 192
x = 192 - 25y
x = 192 - 200 - 25x
26x = -8