-6-9=-6u+9-6u

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Solution for -6-9=-6u+9-6u equation:


Simplifying
-6 + -9 = -6u + 9 + -6u

Combine like terms: -6 + -9 = -15
-15 = -6u + 9 + -6u

Reorder the terms:
-15 = 9 + -6u + -6u

Combine like terms: -6u + -6u = -12u
-15 = 9 + -12u

Solving
-15 = 9 + -12u

Solving for variable 'u'.

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

Add '12u' to each side of the equation.
-15 + 12u = 9 + -12u + 12u

Combine like terms: -12u + 12u = 0
-15 + 12u = 9 + 0
-15 + 12u = 9

Add '15' to each side of the equation.
-15 + 15 + 12u = 9 + 15

Combine like terms: -15 + 15 = 0
0 + 12u = 9 + 15
12u = 9 + 15

Combine like terms: 9 + 15 = 24
12u = 24

Divide each side by '12'.
u = 2

Simplifying
u = 2

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