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2x-3y=2
y=3-3x
2x-3(3-3x)=2
y=3-3x
2x-9+9x=2
y=3-3x
11x=11 /:11
y=3-3x
x=1
y=3-3*1
x=1
y=3-3
x=1
y=0
x=1