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1/3x-1/3y-1/2x-1/2y = -1/2 |*6
x = 3-y
2x-2y-3x-3y = -3
x = 3-y
-x-5y = -3
x = 3-y
-(3-y)-5y = -3
x = 3-y
-3+y-5y = -3
x = 3-y
-4y = 0 |:(-4)
x = 3-y
y = 0
x = 3-0 = 3
x+y=3
2x-2y-3x-3y=-3
x=3-y
-x-5y=-3
-(3-y)-5y=-3
-3+y-5y=-3
-4y=-3+3
-4y=0
y=0
x=3-0=0
x=3
y=0
x+y=3
2x-2y-3x-3y=-3
y=3-x
-x-5y=-3
y=3-x
-x-5(3-x)=-3
y=3-x
-x-15+5x=-3
y=3-x
4x-15=-3
y=3-x
4x=12
y=3-x
x=3
y=3-3
x=3
y=0