7u+9=-1+8u

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Solution for 7u+9=-1+8u equation:


Simplifying
7u + 9 = -1 + 8u

Reorder the terms:
9 + 7u = -1 + 8u

Solving
9 + 7u = -1 + 8u

Solving for variable 'u'.

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

Add '-8u' to each side of the equation.
9 + 7u + -8u = -1 + 8u + -8u

Combine like terms: 7u + -8u = -1u
9 + -1u = -1 + 8u + -8u

Combine like terms: 8u + -8u = 0
9 + -1u = -1 + 0
9 + -1u = -1

Add '-9' to each side of the equation.
9 + -9 + -1u = -1 + -9

Combine like terms: 9 + -9 = 0
0 + -1u = -1 + -9
-1u = -1 + -9

Combine like terms: -1 + -9 = -10
-1u = -10

Divide each side by '-1'.
u = 10

Simplifying
u = 10

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