Question

A = 2b so what is the value of b-a=?
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Answer 1

-b

Explanation:

b-a

=b-2b [a=2b]

=-b

note: This is what I think the answer might be but it looks too easy to be correct so i might be wrong:(

Answer 2

a=2b

b-a=x

ax=2b²

x=2b²/a

therefore, b-a=2b²/a