30=2u+3(u+5)

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Solution for 30=2u+3(u+5) equation:


Simplifying
30 = 2u + 3(u + 5)

Reorder the terms:
30 = 2u + 3(5 + u)
30 = 2u + (5 * 3 + u * 3)
30 = 2u + (15 + 3u)

Reorder the terms:
30 = 15 + 2u + 3u

Combine like terms: 2u + 3u = 5u
30 = 15 + 5u

Solving
30 = 15 + 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.
30 + -5u = 15 + 5u + -5u

Combine like terms: 5u + -5u = 0
30 + -5u = 15 + 0
30 + -5u = 15

Add '-30' to each side of the equation.
30 + -30 + -5u = 15 + -30

Combine like terms: 30 + -30 = 0
0 + -5u = 15 + -30
-5u = 15 + -30

Combine like terms: 15 + -30 = -15
-5u = -15

Divide each side by '-5'.
u = 3

Simplifying
u = 3

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