Solve for u. 3 (3u-5) = 39. Simplify your answer as much as possible.

Step-by-step explanation:

3 (3u-5) = 39

9u - 15 = 39

9u = 15 + 39

9u = 54

divide both by 9

u = 54/9

u = 6

3 (3u-5) = 39

Mutiply the bracket by 3

(3) (3u) (3) (-5) = 39

9u-15=39

Move - 15 to the other side

Sign changes from - 15 to + 15

9u-15+15 = 39+15

9u = 54

Divide by 9

9u/9 = 54/9

Cross out 9 and 9, divide by 9 and then becomes u.

u = 6

Answer: u = 6