7=-8.1+u

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Solution for 7=-8.1+u equation:


Simplifying
7 = -8.1 + u

Solving
7 = -8.1 + 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 = -8.1 + u + -1u

Combine like terms: u + -1u = 0
7 + -1u = -8.1 + 0
7 + -1u = -8.1

Add '-7' to each side of the equation.
7 + -7 + -1u = -8.1 + -7

Combine like terms: 7 + -7 = 0
0 + -1u = -8.1 + -7
-1u = -8.1 + -7

Combine like terms: -8.1 + -7 = -15.1
-1u = -15.1

Divide each side by '-1'.
u = 15.1

Simplifying
u = 15.1

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