x+(7x-18)=90

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Solution for x+(7x-18)=90 equation:


Simplifying
x + (7x + -18) = 90

Reorder the terms:
x + (-18 + 7x) = 90

Remove parenthesis around (-18 + 7x)
x + -18 + 7x = 90

Reorder the terms:
-18 + x + 7x = 90

Combine like terms: x + 7x = 8x
-18 + 8x = 90

Solving
-18 + 8x = 90

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 8x = 90 + 18

Combine like terms: -18 + 18 = 0
0 + 8x = 90 + 18
8x = 90 + 18

Combine like terms: 90 + 18 = 108
8x = 108

Divide each side by '8'.
x = 13.5

Simplifying
x = 13.5

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