SOLUTION: Hi there! I've totally learned this before, but can't remember for the life of me how to do it! Here it is: b + c = 10/a Solve for a. I know the answer is a = 10 / b

Algebra ->  Equations -> SOLUTION: Hi there! I've totally learned this before, but can't remember for the life of me how to do it! Here it is: b + c = 10/a Solve for a. I know the answer is a = 10 / b      Log On


   

Question 212316: Hi there! I've totally learned this before, but can't remember for the life of me how to do it!
Here it is:
b + c = 10/a Solve for a. I know the answer is a = 10 / b + c, BUT WHY!? T.T
Found 3 solutions by Earlsdon, checkley77, rapaljer:
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for a:
b%2Bc+=+10%2Fa Multiply both sides by a.
a%28b%2Bc%29+=+10 Divide both sides by (b+c).
a+=+10%2F%28b%2Bc%29

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
b + c = 10/a Cross multiply
a(b+c)=10 Divide both sides by (b+c)
a=10/(b+c) Ans.

Answer by rapaljer(4671) About Me  (Show Source):
You can put this solution on YOUR website!
I recommend that you multiply both sides by the denominator "a".

b%2Bc%29+=+10%2Fa
a%28b%2Bc%29+=+a%2A%2810%2Fa%29
a%28b%2Bc%29+=+10

Next, divide both sides by (b+c):
a=+10%2F%28b%2Bc%29+

R^2