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 = -2
8u = -2

Divide each side by '8'.
u = -0.25

Simplifying
u = -0.25

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