31-3u=8

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Solution for 31-3u=8 equation: 


Simplifying
31 + -3u = 8

Solving
31 + -3u = 8

Solving for variable 'u'.

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

Add '-31' to each side of the equation.
31 + -31 + -3u = 8 + -31

Combine like terms: 31 + -31 = 0
0 + -3u = 8 + -31
-3u = 8 + -31

Combine like terms: 8 + -31 = -23
-3u = -23

Divide each side by '-3'.
u = 7.666666667

Simplifying
u = 7.666666667

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