2x+20-20=180

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Solution for 2x+20-20=180 equation: 


Simplifying
2x + 20 + -20 = 180

Reorder the terms:
20 + -20 + 2x = 180

Combine like terms: 20 + -20 = 0
0 + 2x = 180
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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