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3x-2y=6
2x+y=4
3x-2y=6
y=4-2x
3x-2(4-2x)=6
y=4-2x
3x-8+4x=6
y=4-2x
7x=14/7
y=4-2x
x=2
y=4-2*2
x=2
y=0
rozwiazanie w zalaczniku