120-35=100-x

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Solution for 120-35=100-x equation:


Simplifying
120 + -35 = 100 + -1x

Combine like terms: 120 + -35 = 85
85 = 100 + -1x

Solving
85 = 100 + -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.
85 + x = 100 + -1x + x

Combine like terms: -1x + x = 0
85 + x = 100 + 0
85 + x = 100

Add '-85' to each side of the equation.
85 + -85 + x = 100 + -85

Combine like terms: 85 + -85 = 0
0 + x = 100 + -85
x = 100 + -85

Combine like terms: 100 + -85 = 15
x = 15

Simplifying
x = 15

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