(180-x)+(90-x)=100

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Solution for (180-x)+(90-x)=100 equation:


Simplifying
(180 + -1x) + (90 + -1x) = 100

Remove parenthesis around (180 + -1x)
180 + -1x + (90 + -1x) = 100

Remove parenthesis around (90 + -1x)
180 + -1x + 90 + -1x = 100

Reorder the terms:
180 + 90 + -1x + -1x = 100

Combine like terms: 180 + 90 = 270
270 + -1x + -1x = 100

Combine like terms: -1x + -1x = -2x
270 + -2x = 100

Solving
270 + -2x = 100

Solving for variable 'x'.

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

Add '-270' to each side of the equation.
270 + -270 + -2x = 100 + -270

Combine like terms: 270 + -270 = 0
0 + -2x = 100 + -270
-2x = 100 + -270

Combine like terms: 100 + -270 = -170
-2x = -170

Divide each side by '-2'.
x = 85

Simplifying
x = 85

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