Question

quanto é $\frac{3(m-2}{3}-\frac{2(m+1)}{7} +1 = - 2(m-1)$

Answer 1

Resposta:

$\frac{3(m-2)}{3} -\frac{2(m+1)}{7} +1=-2(m-1)\\ \\ \\ mmc=21\\ \\ \\ \frac{7.3(m-2)-3.2(m+1)+21=21.(-2)(m-1)}{21} \\ \\ \\ 21(m-2)-6(m+1)+21=-42(m-1)\\ \\ 21m-42-6m-6+21=-42m+42\\ \\ \\ 21m-6m+42m=42-42-6+21\\ \\ \\ 57m=15\\ \\ m=\frac{15}{57}$