9u+6+15=4u-4

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Solution for 9u+6+15=4u-4 equation:


Simplifying
9u + 6 + 15 = 4u + -4

Reorder the terms:
6 + 15 + 9u = 4u + -4

Combine like terms: 6 + 15 = 21
21 + 9u = 4u + -4

Reorder the terms:
21 + 9u = -4 + 4u

Solving
21 + 9u = -4 + 4u

Solving for variable 'u'.

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

Add '-4u' to each side of the equation.
21 + 9u + -4u = -4 + 4u + -4u

Combine like terms: 9u + -4u = 5u
21 + 5u = -4 + 4u + -4u

Combine like terms: 4u + -4u = 0
21 + 5u = -4 + 0
21 + 5u = -4

Add '-21' to each side of the equation.
21 + -21 + 5u = -4 + -21

Combine like terms: 21 + -21 = 0
0 + 5u = -4 + -21
5u = -4 + -21

Combine like terms: -4 + -21 = -25
5u = -25

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

Simplifying
u = -5

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