3x+6x+9=90

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Solution for 3x+6x+9=90 equation: 


Simplifying
3x + 6x + 9 = 90

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

Combine like terms: 3x + 6x = 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 = 81
9x = 81

Divide each side by '9'.
x = 9

Simplifying
x = 9

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