-9u-7=-8u

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


Simplifying
-9u + -7 = -8u

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

Solving
-7 + -9u = -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.
-7 + -9u + 8u = -8u + 8u

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

Combine like terms: -8u + 8u = 0
-7 + -1u = 0

Add '7' to each side of the equation.
-7 + 7 + -1u = 0 + 7

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

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

Divide each side by '-1'.
u = -7

Simplifying
u = -7

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