Question

-34 + 91 = -3 (4x + 1) + 6x

Answer 1

$-34 + 91 = -3(4x+1) + 6x\\57 = -12x - 3 + 6x\\6x = -60\\x= -10$

Thus x = -10.

Hope that helps!

Answer 2

X=-10
Look at the attached picture to see how to do it.