39=4u-9

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Solution for 39=4u-9 equation:


Simplifying
39 = 4u + -9

Reorder the terms:
39 = -9 + 4u

Solving
39 = -9 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
39 + -4u = -9 + 4u + -4u

Combine like terms: 4u + -4u = 0
39 + -4u = -9 + 0
39 + -4u = -9

Add '-39' to each side of the equation.
39 + -39 + -4u = -9 + -39

Combine like terms: 39 + -39 = 0
0 + -4u = -9 + -39
-4u = -9 + -39

Combine like terms: -9 + -39 = -48
-4u = -48

Divide each side by '-4'.
u = 12

Simplifying
u = 12

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