6x+(3x-9)=90

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Solution for 6x+(3x-9)=90 equation:


Simplifying
6x + (3x + -9) = 90

Reorder the terms:
6x + (-9 + 3x) = 90

Remove parenthesis around (-9 + 3x)
6x + -9 + 3x = 90

Reorder the terms:
-9 + 6x + 3x = 90

Combine like terms: 6x + 3x = 9x
-9 + 9x = 90

Solving
-9 + 9x = 90

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 9x = 90 + 9

Combine like terms: -9 + 9 = 0
0 + 9x = 90 + 9
9x = 90 + 9

Combine like terms: 90 + 9 = 99
9x = 99

Divide each side by '9'.
x = 11

Simplifying
x = 11

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