-3u-15=-9(u+7)

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Solution for -3u-15=-9(u+7) equation:


Simplifying
-3u + -15 = -9(u + 7)

Reorder the terms:
-15 + -3u = -9(u + 7)

Reorder the terms:
-15 + -3u = -9(7 + u)
-15 + -3u = (7 * -9 + u * -9)
-15 + -3u = (-63 + -9u)

Solving
-15 + -3u = -63 + -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 + -3u + 9u = -63 + -9u + 9u

Combine like terms: -3u + 9u = 6u
-15 + 6u = -63 + -9u + 9u

Combine like terms: -9u + 9u = 0
-15 + 6u = -63 + 0
-15 + 6u = -63

Add '15' to each side of the equation.
-15 + 15 + 6u = -63 + 15

Combine like terms: -15 + 15 = 0
0 + 6u = -63 + 15
6u = -63 + 15

Combine like terms: -63 + 15 = -48
6u = -48

Divide each side by '6'.
u = -8

Simplifying
u = -8

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