90=x+(90-x)

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


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

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

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

Combine like terms: x + -1x = 0
90 = 90 + 0
90 = 90

Add '-90' to each side of the equation.
90 + -90 = 90 + -90

Combine like terms: 90 + -90 = 0
0 = 90 + -90

Combine like terms: 90 + -90 = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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