9+2x+x=90

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Solution for 9+2x+x=90 equation: 


Simplifying
9 + 2x + x = 90

Combine like terms: 2x + x = 3x
9 + 3x = 90

Solving
9 + 3x = 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 + 3x = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 3x = 90 + -9
3x = 90 + -9

Combine like terms: 90 + -9 = 81
3x = 81

Divide each side by '3'.
x = 27

Simplifying
x = 27

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