31+x=100

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Solution for 31+x=100 equation: 


Simplifying
31 + x = 100

Solving
31 + x = 100

Solving for variable 'x'.

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

Add '-31' to each side of the equation.
31 + -31 + x = 100 + -31

Combine like terms: 31 + -31 = 0
0 + x = 100 + -31
x = 100 + -31

Combine like terms: 100 + -31 = 69
x = 69

Simplifying
x = 69

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