3(2x+15)=-9
6x +45=-9
6x=-45-9
6x=-54/:6
x=-9
odpowiedź a)
6x+45=-9
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3(2x+15)=-9
6x +45=-9
6x=-45-9
6x=-54/:6
x=-9
odpowiedź a)
3(2x+15)=-9
6x+45=-9
6x=-45-9
6x=-54/:6
x=-9
odpowiedź a)