SOLUTION: r=ab/a+b ;a solve for a

Question 57746This question is from textbook mcdougal littell
: r=ab/a+b ;a solve for a This question is from textbook mcdougal littell

Found 2 solutions by stanbon, funmath:
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
r=ab/(a+b) ;a solve for a
Cross-multiply to get:
ra+rb=ab
Get the "a's' on one side:
ab-ra=rb
Factor out the "a" to get:
a(b-r)=rb
a=rb/(b-r)
Cheers,
Stan H.
Answer by funmath(2933) (Show Source): You can put this solution on YOUR website!
;a solve for a
Multiply both sides by LCD.
Get all the a's on one side of the = sign

Get the things without a's on the other side of the = sign.

Factor out the a on the left.
Divide both sides by r-b.

it could be written as:
Happy Calculating!!!
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