Respostas

2013-09-26T16:42:55-03:00
7x-[5x+3-2x-1-10] = x-3
7x-5x-3+2x+1+10=x-3
4x+8=x-3
4x-x+8+3=0
3x=-11
x= \frac{-11}{3}

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