90+x+x=180

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Solution for 90+x+x=180 equation: 


Simplifying
90 + x + x = 180

Combine like terms: x + x = 2x
90 + 2x = 180

Solving
90 + 2x = 180

Solving for variable 'x'.

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

Add '-90' to each side of the equation.
90 + -90 + 2x = 180 + -90

Combine like terms: 90 + -90 = 0
0 + 2x = 180 + -90
2x = 180 + -90

Combine like terms: 180 + -90 = 90
2x = 90

Divide each side by '2'.
x = 45

Simplifying
x = 45

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