Question

como resolver essa equacao 2x + x=7 -10x

Answer 1

2x + x = 7 - 10x
3x = 7 - 10x
3x + 10x = 7
13x = 7
x = 7/13 

Answer 2

$2x+x=7-10x\\ 2x+x+10x=7\\ 13x=7\\ x= \frac{7}{13}$