Question

If 13 = 13w/(1-w) ,then (2w)2 =

a.1/4

b.1/2

c.1

d.2 (ans.c) if a and b are positive integers and (a-b)/3.5 = 4/7, then

Answer 1

answer is 2
because equation both sides
13=13w/1-w
then
w/1-w=1
1-w=w
2w=1
(2w)2=2
answer is 2