-9u-15=-3(u-3)

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Solution for -9u-15=-3(u-3) equation:


Simplifying
-9u + -15 = -3(u + -3)

Reorder the terms:
-15 + -9u = -3(u + -3)

Reorder the terms:
-15 + -9u = -3(-3 + u)
-15 + -9u = (-3 * -3 + u * -3)
-15 + -9u = (9 + -3u)

Solving
-15 + -9u = 9 + -3u

Solving for variable 'u'.

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

Add '3u' to each side of the equation.
-15 + -9u + 3u = 9 + -3u + 3u

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

Combine like terms: -3u + 3u = 0
-15 + -6u = 9 + 0
-15 + -6u = 9

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

Combine like terms: -15 + 15 = 0
0 + -6u = 9 + 15
-6u = 9 + 15

Combine like terms: 9 + 15 = 24
-6u = 24

Divide each side by '-6'.
u = -4

Simplifying
u = -4

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