If a number is subtracted from the numerator of 3/5 and the same number is added to the denominator of 3/5, the result is equivalent to 1. Find the number. The number is

Answer 1

(3-x)/(5+x) = 1

3-x = 5+x

2x =-2

x=-1

(3+1)/(5-1) = 4/4 = 1