-7=-15+u

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Solution for -7=-15+u equation:


Simplifying
-7 = -15 + u

Solving
-7 = -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.
-7 + -1u = -15 + u + -1u

Combine like terms: u + -1u = 0
-7 + -1u = -15 + 0
-7 + -1u = -15

Add '7' to each side of the equation.
-7 + 7 + -1u = -15 + 7

Combine like terms: -7 + 7 = 0
0 + -1u = -15 + 7
-1u = -15 + 7

Combine like terms: -15 + 7 = -8
-1u = -8

Divide each side by '-1'.
u = 8

Simplifying
u = 8

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