3(u+6)=42

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Solution for 3(u+6)=42 equation: 


Simplifying
3(u + 6) = 42

Reorder the terms:
3(6 + u) = 42
(6 * 3 + u * 3) = 42
(18 + 3u) = 42

Solving
18 + 3u = 42

Solving for variable 'u'.

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

Add '-18' to each side of the equation.
18 + -18 + 3u = 42 + -18

Combine like terms: 18 + -18 = 0
0 + 3u = 42 + -18
3u = 42 + -18

Combine like terms: 42 + -18 = 24
3u = 24

Divide each side by '3'.
u = 8

Simplifying
u = 8

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