SOLUTION: 1/r = 1/A+1/B+1/C Solve for A

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Question 774893: 1/r = 1/A+1/B+1/C Solve for A
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
1%2Fr = 1%2FA+1%2FB+1%2FC Solve for A
subtract 1/B and 1/C from both sides
1%2Fr-1%2FB-1%2FC = 1%2FA
Multiply both sides by A
A[1%2Fr-1%2FB-1%2FC] = 1
divide both sides by [1%2Fr-1%2FB-1%2FC]
A = 1/[1%2Fr-1%2FB-1%2FC]