31=9+x

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Solution for 31=9+x equation: 


Simplifying
31 = 9 + x

Solving
31 = 9 + 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.
31 + -1x = 9 + x + -1x

Combine like terms: x + -1x = 0
31 + -1x = 9 + 0
31 + -1x = 9

Add '-31' to each side of the equation.
31 + -31 + -1x = 9 + -31

Combine like terms: 31 + -31 = 0
0 + -1x = 9 + -31
-1x = 9 + -31

Combine like terms: 9 + -31 = -22
-1x = -22

Divide each side by '-1'.
x = 22

Simplifying
x = 22

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