18=9u+13

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Solution for 18=9u+13 equation:


Simplifying
18 = 9u + 13

Reorder the terms:
18 = 13 + 9u

Solving
18 = 13 + 9u

Solving for variable 'u'.

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

Add '-9u' to each side of the equation.
18 + -9u = 13 + 9u + -9u

Combine like terms: 9u + -9u = 0
18 + -9u = 13 + 0
18 + -9u = 13

Add '-18' to each side of the equation.
18 + -18 + -9u = 13 + -18

Combine like terms: 18 + -18 = 0
0 + -9u = 13 + -18
-9u = 13 + -18

Combine like terms: 13 + -18 = -5
-9u = -5

Divide each side by '-9'.
u = 0.5555555556

Simplifying
u = 0.5555555556

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