90=6x+3(x+3)

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


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

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

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

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

Solving
90 = 9 + 9x

Solving for variable 'x'.

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

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

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

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

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

Combine like terms: 9 + -90 = -81
-9x = -81

Divide each side by '-9'.
x = 9

Simplifying
x = 9

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