Question

alguém me ajuda pfv?

Answer 1

(1+3x)-(1-2x)+(-11-7x) = 5
1+3x - 1+2x -11 -7x = 5 
3x- (+2x) - 7x = 5 - 1 + 11
3x - 2x - 7x = 5-1+11
3x-9x = 5-1+11
-6x = 15
x= 15/-6