90+(x+20)+(x-20)=180

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Solution for 90+(x+20)+(x-20)=180 equation: 


Simplifying
90 + (x + 20) + (x + -20) = 180

Reorder the terms:
90 + (20 + x) + (x + -20) = 180

Remove parenthesis around (20 + x)
90 + 20 + x + (x + -20) = 180

Reorder the terms:
90 + 20 + x + (-20 + x) = 180

Remove parenthesis around (-20 + x)
90 + 20 + x + -20 + x = 180

Reorder the terms:
90 + 20 + -20 + x + x = 180

Combine like terms: 90 + 20 = 110
110 + -20 + x + x = 180

Combine like terms: 110 + -20 = 90
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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