3x+9x=33+x

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Solution for 3x+9x=33+x equation: 


Simplifying
3x + 9x = 33 + x

Combine like terms: 3x + 9x = 12x
12x = 33 + x

Solving
12x = 33 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
12x + -1x = 33 + x + -1x

Combine like terms: 12x + -1x = 11x
11x = 33 + x + -1x

Combine like terms: x + -1x = 0
11x = 33 + 0
11x = 33

Divide each side by '11'.
x = 3

Simplifying
x = 3

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