(180-X)+(180-2X)=180

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Solution for (180-X)+(180-2X)=180 equation: 


Simplifying
(180 + -1X) + (180 + -2X) = 180

Remove parenthesis around (180 + -1X)
180 + -1X + (180 + -2X) = 180

Remove parenthesis around (180 + -2X)
180 + -1X + 180 + -2X = 180

Reorder the terms:
180 + 180 + -1X + -2X = 180

Combine like terms: 180 + 180 = 360
360 + -1X + -2X = 180

Combine like terms: -1X + -2X = -3X
360 + -3X = 180

Solving
360 + -3X = 180

Solving for variable 'X'.

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

Add '-360' to each side of the equation.
360 + -360 + -3X = 180 + -360

Combine like terms: 360 + -360 = 0
0 + -3X = 180 + -360
-3X = 180 + -360

Combine like terms: 180 + -360 = -180
-3X = -180

Divide each side by '-3'.
X = 60

Simplifying
X = 60

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