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2(2x+7)+3(x-1)=6(x+3)-18

Răspuns :

4x+14+3x-3=6x+18-18
7x+11=6x
7x-6x=-11
x=-11
4x+14+3x-3=6x+18-18
7x+11=6x
7x-6x=-11
x=-11