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3(2x-7)-5(x-2)-3=2(x-7)+7


Răspuns :

3(2x-7)-5(x-2)-3=2(x-7)+7
6x-21-(5x-10)-3=2x-14+7
6x-21-5x+10-3=2x-7
x-11-3=2x-7
x-14=2x-7
x-7=2x
-7=x