Rusty has the right answer.
My approach is just a little different:
REMEMBER YOUR GOAL IN ANY PROBLEM: Get the variable alone on one side of the equal sign.
Step 1. Do the math according to the order of operations:
(Think: "Please Excuse
My Dear Aunt
Sally")
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
Step 2. Get U alone on one side of the equal sign by removing everything else from that side:
(Remember: What you do to one side of the = sign, you must do to the other side as well, so you do not change the value)
Step 3. Divide to Solve for U
1. Multiply: 2u  3 = 2(4  u) 3
2u  3 = 8  2u  3
2. Add: 2u  3 + 3 = 8  2u  3 + 3
2u = 8  2u
Add: 2u + 2u = 8  2u + 2u
4u = 8
3: Divide: 4u = 8
4 4
u = 2
9/6/2013

Margaret S.