31+28+x=90

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Solution for 31+28+x=90 equation: 


Simplifying
31 + 28 + x = 90

Combine like terms: 31 + 28 = 59
59 + x = 90

Solving
59 + x = 90

Solving for variable 'x'.

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

Add '-59' to each side of the equation.
59 + -59 + x = 90 + -59

Combine like terms: 59 + -59 = 0
0 + x = 90 + -59
x = 90 + -59

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

Simplifying
x = 31

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