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5*(x+)+3*(x+2)=2*(15-x)

Răspuns :

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5*(x+3)*(x+2)=2*(15-x)
5*(x^2+2x+3x+6)=30-2x
5x^2+10x+15x+30-30+2x
5x^2+27x=0
x(5x+27)=0
x=0
5x+27=0
5x=-27
x=-27/5