rozwiaz rownanie 2(3x+7)=7x
2(3x+7)=7x
6x+14=7x
7x-6x=14
x=14
6x-7x= -14
-x=-14 /-1
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2(3x+7)=7x
6x+14=7x
7x-6x=14
x=14
2(3x+7)=7x
6x+14=7x
6x-7x= -14
-x=-14 /-1
x=14