109=120-x

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Solution for 109=120-x equation:


Simplifying
109 = 120 + -1x

Solving
109 = 120 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
109 + x = 120 + -1x + x

Combine like terms: -1x + x = 0
109 + x = 120 + 0
109 + x = 120

Add '-109' to each side of the equation.
109 + -109 + x = 120 + -109

Combine like terms: 109 + -109 = 0
0 + x = 120 + -109
x = 120 + -109

Combine like terms: 120 + -109 = 11
x = 11

Simplifying
x = 11

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