u-9=-7u+7

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Solution for u-9=-7u+7 equation:


Simplifying
u + -9 = -7u + 7

Reorder the terms:
-9 + u = -7u + 7

Reorder the terms:
-9 + u = 7 + -7u

Solving
-9 + u = 7 + -7u

Solving for variable 'u'.

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

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

Combine like terms: u + 7u = 8u
-9 + 8u = 7 + -7u + 7u

Combine like terms: -7u + 7u = 0
-9 + 8u = 7 + 0
-9 + 8u = 7

Add '9' to each side of the equation.
-9 + 9 + 8u = 7 + 9

Combine like terms: -9 + 9 = 0
0 + 8u = 7 + 9
8u = 7 + 9

Combine like terms: 7 + 9 = 16
8u = 16

Divide each side by '8'.
u = 2

Simplifying
u = 2

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