6+8x=90+x

Solution for 6+8x=90+x equation:

Simplifying
6 + 8x = 90 + x

Solving
6 + 8x = 90 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
6 + 8x + -1x = 90 + x + -1x

Combine like terms: 8x + -1x = 7x
6 + 7x = 90 + x + -1x

Combine like terms: x + -1x = 0
6 + 7x = 90 + 0
6 + 7x = 90

Add '-6' to each side of the equation.
6 + -6 + 7x = 90 + -6

Combine like terms: 6 + -6 = 0
0 + 7x = 90 + -6
7x = 90 + -6

Combine like terms: 90 + -6 = 84
7x = 84

Divide each side by '7'.
x = 12

Simplifying
x = 12