SOLUTION: I am stuck. Please help. c=2cd over a-d, for d ?

Algebra ->  Divisibility and Prime Numbers -> SOLUTION: I am stuck. Please help. c=2cd over a-d, for d ?      Log On


   

Question 414262: I am stuck. Please help. c=2cd over a-d, for d ?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
c= %282cd%29%2F%28a-d%29, for d
Multiply both sides by (a-d)
c(a-d) = 2cd
:
multiply inside the brackets by c
ca - cd = 2dc
;
We can simplify this, divide thru by c
a - d = 2d
:
add d to both sides
a = d + 2d
a = 3d
:
divide both sides by 3
d = a%2F3