15=u+4

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Solution for 15=u+4 equation:


Simplifying
15 = u + 4

Reorder the terms:
15 = 4 + u

Solving
15 = 4 + u

Solving for variable 'u'.

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

Add '-1u' to each side of the equation.
15 + -1u = 4 + u + -1u

Combine like terms: u + -1u = 0
15 + -1u = 4 + 0
15 + -1u = 4

Add '-15' to each side of the equation.
15 + -15 + -1u = 4 + -15

Combine like terms: 15 + -15 = 0
0 + -1u = 4 + -15
-1u = 4 + -15

Combine like terms: 4 + -15 = -11
-1u = -11

Divide each side by '-1'.
u = 11

Simplifying
u = 11

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