x+4+7x-10=90

Solution for x+4+7x-10=90 equation:

Simplifying
x + 4 + 7x + -10 = 90

Reorder the terms:
4 + -10 + x + 7x = 90

Combine like terms: 4 + -10 = -6
-6 + x + 7x = 90

Combine like terms: x + 7x = 8x
-6 + 8x = 90

Solving
-6 + 8x = 90

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '6' to each side of the equation.
-6 + 6 + 8x = 90 + 6

Combine like terms: -6 + 6 = 0
0 + 8x = 90 + 6
8x = 90 + 6

Combine like terms: 90 + 6 = 96
8x = 96

Divide each side by '8'.
x = 12

Simplifying
x = 12