31-15+x+x=180

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Solution for 31-15+x+x=180 equation: 


Simplifying
31 + -15 + x + x = 180

Combine like terms: 31 + -15 = 16
16 + x + x = 180

Combine like terms: x + x = 2x
16 + 2x = 180

Solving
16 + 2x = 180

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + 2x = 180 + -16

Combine like terms: 16 + -16 = 0
0 + 2x = 180 + -16
2x = 180 + -16

Combine like terms: 180 + -16 = 164
2x = 164

Divide each side by '2'.
x = 82

Simplifying
x = 82

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