# Math Help - Algebra Equation

1. ## Algebra Equation

2. Originally Posted by Punch
..
Well what have you done and what specific problems are you having with this?

CB

3. I don't know how to write an expression and how to form an equation and deduce it. I have solved the equation for part iii

4. if AB+CD+X=200 what would AB be?

5. Originally Posted by bigwave
if AB+CD+X=200 what would AB be?
$\frac {200}{2x}$?