90=(9x-84)+(9x-60)

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Solution for 90=(9x-84)+(9x-60) equation:


Simplifying
90 = (9x + -84) + (9x + -60)

Reorder the terms:
90 = (-84 + 9x) + (9x + -60)

Remove parenthesis around (-84 + 9x)
90 = -84 + 9x + (9x + -60)

Reorder the terms:
90 = -84 + 9x + (-60 + 9x)

Remove parenthesis around (-60 + 9x)
90 = -84 + 9x + -60 + 9x

Reorder the terms:
90 = -84 + -60 + 9x + 9x

Combine like terms: -84 + -60 = -144
90 = -144 + 9x + 9x

Combine like terms: 9x + 9x = 18x
90 = -144 + 18x

Solving
90 = -144 + 18x

Solving for variable 'x'.

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

Add '-18x' to each side of the equation.
90 + -18x = -144 + 18x + -18x

Combine like terms: 18x + -18x = 0
90 + -18x = -144 + 0
90 + -18x = -144

Add '-90' to each side of the equation.
90 + -90 + -18x = -144 + -90

Combine like terms: 90 + -90 = 0
0 + -18x = -144 + -90
-18x = -144 + -90

Combine like terms: -144 + -90 = -234
-18x = -234

Divide each side by '-18'.
x = 13

Simplifying
x = 13

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