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-2x+3y=-4 / *3 obustronnie
6x-8y=14
-6x+9y=-12
y=2
-2x+6=-4
-2x=-10
x=5
x=5
y=2
3x-4y=7/*2
-2x+3y=4/*2
6x-8y=14
-6x+9y=12
x=5