Math Destroyer 12 #28

[Strag]

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Simplify this expression as much as possible, where a is not 1:
1- 1/[1+a/(1-a)]

answer is the letter a

I got it simplified to 2a/1+a but I don't know where to go from there

 

[AlbinoPolarBear]

Simplify this expression as much as possible, where a is not 1:
1- 1/[1+a/(1-a)]

answer is the letter a

I got it simplified to 2a/1+a but I don't know where to go from there

you're welcome =)