51=4u+15

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Solution for 51=4u+15 equation:


Simplifying
51 = 4u + 15

Reorder the terms:
51 = 15 + 4u

Solving
51 = 15 + 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.
51 + -4u = 15 + 4u + -4u

Combine like terms: 4u + -4u = 0
51 + -4u = 15 + 0
51 + -4u = 15

Add '-51' to each side of the equation.
51 + -51 + -4u = 15 + -51

Combine like terms: 51 + -51 = 0
0 + -4u = 15 + -51
-4u = 15 + -51

Combine like terms: 15 + -51 = -36
-4u = -36

Divide each side by '-4'.
u = 9

Simplifying
u = 9

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