15-u=2(u+3)

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Solution for 15-u=2(u+3) equation:


Simplifying
15 + -1u = 2(u + 3)

Reorder the terms:
15 + -1u = 2(3 + u)
15 + -1u = (3 * 2 + u * 2)
15 + -1u = (6 + 2u)

Solving
15 + -1u = 6 + 2u

Solving for variable 'u'.

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

Add '-2u' to each side of the equation.
15 + -1u + -2u = 6 + 2u + -2u

Combine like terms: -1u + -2u = -3u
15 + -3u = 6 + 2u + -2u

Combine like terms: 2u + -2u = 0
15 + -3u = 6 + 0
15 + -3u = 6

Add '-15' to each side of the equation.
15 + -15 + -3u = 6 + -15

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

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

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

Simplifying
u = 3

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