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__ = ___
x+1 1,2
7,2x-1,2=2,3x+2,3
4,9x=3,5/:3,5
x=7/2*10/49=5/7
i 2 przykład:
-x 2x
__ = ______
3x-1 1-6x
-x+6x²=6x²-2x
x=0