# Thread: HELP on solving this equation for Q

1. ## HELP on solving this equation for Q

2L/D=(6Q/D)+5
I have to solve for Q, how do I get rid of the D's at the bottom??
Lost on this one.

2L/D=(6Q/D)+5
I have to solve for Q, how do I get rid of the D's at the bottom??
multiply every term by D

3. So multiplying D on each side, you get rid of both of them and are left with
2L=6Q+5??

See the letters have a value L = 100, Q is 25 and D is 10.
So if solving for Q so need an answer once multiplied to each other comes to 25.

Still stuck!!

so multiplying d on each side, you get rid of both of them and are left with
2l=6q+5??
2l = 6q + 5d

5. Sorry I must be a bit dense on this. Something is not clicking.
If you divide the first D from the left side.
You are left with 2L=D(6Q/D)+5
Is that correct?
Now if I get rid of the D on the right side. would it not get rid of the D? then there is no D left??Because you have to divide out it all out of the right side.
I am lost, sorry.

6. MULTIPLY every term by $D$ , not divide.

$D \cdot \frac{2L}{D} = D \cdot \frac{6Q}{D} + D \cdot 5$

$2L = 6Q + 5D$

now solve for $Q$

7. OH I see it now. I was putting the 6Q+ 5 in brackets and that was wrong???
Well, I am glad you cleared it up for me, thanks alot Skeeter. Your of great help tonight!!