-9=7-2u

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Solution for -9=7-2u equation:


Simplifying
-9 = 7 + -2u

Solving
-9 = 7 + -2u

Solving for variable 'u'.

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

Add '2u' to each side of the equation.
-9 + 2u = 7 + -2u + 2u

Combine like terms: -2u + 2u = 0
-9 + 2u = 7 + 0
-9 + 2u = 7

Add '9' to each side of the equation.
-9 + 9 + 2u = 7 + 9

Combine like terms: -9 + 9 = 0
0 + 2u = 7 + 9
2u = 7 + 9

Combine like terms: 7 + 9 = 16
2u = 16

Divide each side by '2'.
u = 8

Simplifying
u = 8

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