-15=15+u

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Solution for -15=15+u equation:


Simplifying
-15 = 15 + u

Solving
-15 = 15 + 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 = 15 + u + -1u

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

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

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

Combine like terms: 15 + 15 = 30
-1u = 30

Divide each side by '-1'.
u = -30

Simplifying
u = -30

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