Question

2x -3y +6x -7y

(sabendo que x= -1/2 e y= -1/5)

Answer 1

Resposta:

-2

Explicação passo-a-passo:

$\\ 2x - 3y + 6x - 7y\\ \\ \text{Substituindo valores}\\\\ 2.\left (- \dfrac{1}{2}  \right )-3\left ( -\dfrac{1}{5}  \right )+6.\left (- \dfrac{1}{2}  \right )-7.\left ( -\dfrac{1}{5}  \right )\\\\\\ - \frac{2}{2} +\dfrac{3}{5}  -  \dfrac{6}{2} + \dfrac{7}{5}\\\\ m.m.c = 10\\\\\\  \dfrac{-10+6-30+14}{10}\\\\ \dfrac{-20}{10}=-2$

Bons estudos :)