Question

if a/b=1/2 then a+b/a-b=?

Answer 1

let a=k and b=2k such that a/b = 1/2

implies a+b = 3k and a-b = -k

So (a+b)/(a-b) = -3

Answer 2

a/b 1/2
a 1x
b 2x
a+b 3x
a-b -1x
3x/-1x
-3
hope this helps you
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