31=2u+9

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Solution for 31=2u+9 equation:


Simplifying
31 = 2u + 9

Reorder the terms:
31 = 9 + 2u

Solving
31 = 9 + 2u

Solving for variable 'u'.

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

Add '-2u' to each side of the equation.
31 + -2u = 9 + 2u + -2u

Combine like terms: 2u + -2u = 0
31 + -2u = 9 + 0
31 + -2u = 9

Add '-31' to each side of the equation.
31 + -31 + -2u = 9 + -31

Combine like terms: 31 + -31 = 0
0 + -2u = 9 + -31
-2u = 9 + -31

Combine like terms: 9 + -31 = -22
-2u = -22

Divide each side by '-2'.
u = 11

Simplifying
u = 11

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