31=72-x

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Solution for 31=72-x equation:


Simplifying
31 = 72 + -1x

Solving
31 = 72 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
31 + x = 72 + -1x + x

Combine like terms: -1x + x = 0
31 + x = 72 + 0
31 + x = 72

Add '-31' to each side of the equation.
31 + -31 + x = 72 + -31

Combine like terms: 31 + -31 = 0
0 + x = 72 + -31
x = 72 + -31

Combine like terms: 72 + -31 = 41
x = 41

Simplifying
x = 41

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