6u+15=9(u+4)

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Solution for 6u+15=9(u+4) equation:


Simplifying
6u + 15 = 9(u + 4)

Reorder the terms:
15 + 6u = 9(u + 4)

Reorder the terms:
15 + 6u = 9(4 + u)
15 + 6u = (4 * 9 + u * 9)
15 + 6u = (36 + 9u)

Solving
15 + 6u = 36 + 9u

Solving for variable 'u'.

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

Add '-9u' to each side of the equation.
15 + 6u + -9u = 36 + 9u + -9u

Combine like terms: 6u + -9u = -3u
15 + -3u = 36 + 9u + -9u

Combine like terms: 9u + -9u = 0
15 + -3u = 36 + 0
15 + -3u = 36

Add '-15' to each side of the equation.
15 + -15 + -3u = 36 + -15

Combine like terms: 15 + -15 = 0
0 + -3u = 36 + -15
-3u = 36 + -15

Combine like terms: 36 + -15 = 21
-3u = 21

Divide each side by '-3'.
u = -7

Simplifying
u = -7

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