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y + 28 = 3x
2y - 4 = 3x
y + 28 = 2y - 4
2y - 4 = 3x
- y = - 32
2y - 4 = 3x
y = 32
2 • 32 - 4 = 3x
y = 32
60 = 3x
y = 32
x = 20
y = 32
y+28=3x |*(-2)
2y-4=3x
+ -2y-56=-6x
-60=-3x |*(-1)
3x=60 |:3
x=20
2y-4=3x
2y-4=3*20
2y-4=60 |+4
2y=64 |:2
y=32
x=20
y=32