X=(180-x)

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Solution for X=(180-x) equation:



X=(180-X)
We move all terms to the left:
X-((180-X))=0
We add all the numbers together, and all the variables
X-((-1X+180))=0
We calculate terms in parentheses: -((-1X+180)), so:
(-1X+180)
We get rid of parentheses
-1X+180
Back to the equation:
-(-1X+180)
We get rid of parentheses
X+1X-180=0
We add all the numbers together, and all the variables
2X-180=0
We move all terms containing X to the left, all other terms to the right
2X=180
X=180/2
X=90

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