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3(2x+5)-4(1-2x)=6(2x-3)+17


Răspuns :

6x+15-4+8x=12x-18+17=  14x+11=12x-1=12x-14x=-1+11=-2x+10=x=10 :2 =x=5
6x+15-4+8x=12x-18+17
6x+8x-12x=4-15-18+17
2x=-12
x=-12/2=-6