-81=6u+7u-16

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Solution for -81=6u+7u-16 equation:


Simplifying
-81 = 6u + 7u + -16

Reorder the terms:
-81 = -16 + 6u + 7u

Combine like terms: 6u + 7u = 13u
-81 = -16 + 13u

Solving
-81 = -16 + 13u

Solving for variable 'u'.

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

Add '-13u' to each side of the equation.
-81 + -13u = -16 + 13u + -13u

Combine like terms: 13u + -13u = 0
-81 + -13u = -16 + 0
-81 + -13u = -16

Add '81' to each side of the equation.
-81 + 81 + -13u = -16 + 81

Combine like terms: -81 + 81 = 0
0 + -13u = -16 + 81
-13u = -16 + 81

Combine like terms: -16 + 81 = 65
-13u = 65

Divide each side by '-13'.
u = -5

Simplifying
u = -5

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