80-x=90-x

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Solution for 80-x=90-x equation: 


Simplifying
80 + -1x = 90 + -1x

Add 'x' to each side of the equation.
80 + -1x + x = 90 + -1x + x

Combine like terms: -1x + x = 0
80 + 0 = 90 + -1x + x
80 = 90 + -1x + x

Combine like terms: -1x + x = 0
80 = 90 + 0
80 = 90

Solving
80 = 90

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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