First simplify it a bit: (add 6 to each side of the equation)
4/3u = 7/3 + 8 + 6 Now add up the left side
4/3u = 2 1/3 +8 +6 Continuing
4/3u = 16 1/3
Does that help? What would you do next?
Multiply both sides by 3
(3) x 4/3 u = (3) x (16 1/3) and Simplify
4u = 49 Now what? How about dividing both sides by 4
(4u)/4 = 49/4 and simplify
u = 12 1/4 Ta Da!!!