90-31=x

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Solution for 90-31=x equation:


Simplifying
90 + -31 = x

Combine like terms: 90 + -31 = 59
59 = x

Solving
59 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
59 + -1x = x + -1x

Combine like terms: x + -1x = 0
59 + -1x = 0

Add '-59' to each side of the equation.
59 + -59 + -1x = 0 + -59

Combine like terms: 59 + -59 = 0
0 + -1x = 0 + -59
-1x = 0 + -59

Combine like terms: 0 + -59 = -59
-1x = -59

Divide each side by '-1'.
x = 59

Simplifying
x = 59

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