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

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


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

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

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

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

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

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

Combine like terms: -20 + 20 = 0
0 + x + x = 180
x + x = 180

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

Solving
2x = 180

Solving for variable 'x'.

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

Divide each side by '2'.
x = 90

Simplifying
x = 90

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