3u+9=5(u-1)

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Solution for 3u+9=5(u-1) equation:


Simplifying
3u + 9 = 5(u + -1)

Reorder the terms:
9 + 3u = 5(u + -1)

Reorder the terms:
9 + 3u = 5(-1 + u)
9 + 3u = (-1 * 5 + u * 5)
9 + 3u = (-5 + 5u)

Solving
9 + 3u = -5 + 5u

Solving for variable 'u'.

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

Add '-5u' to each side of the equation.
9 + 3u + -5u = -5 + 5u + -5u

Combine like terms: 3u + -5u = -2u
9 + -2u = -5 + 5u + -5u

Combine like terms: 5u + -5u = 0
9 + -2u = -5 + 0
9 + -2u = -5

Add '-9' to each side of the equation.
9 + -9 + -2u = -5 + -9

Combine like terms: 9 + -9 = 0
0 + -2u = -5 + -9
-2u = -5 + -9

Combine like terms: -5 + -9 = -14
-2u = -14

Divide each side by '-2'.
u = 7

Simplifying
u = 7

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