Question

What should be added to (1/2+1/3-1/5) to get 3?

Answer 1

by-step explanation:

let the no. be x then (1/2+1/3-1/5)+x=3

LCM of the denominators 3,2,5= 30

{(15+10-6)/30}+x=3

19/30+x=3

(19+30x)/30=3

19+30x=90

30x=90-19

30x=71

x=2.36 or 71/30

Answer 2

Sum of 1/2+1/3-1/5

Lcm-30

15+10-6/30

25-6/30

19/30

3-19/30

Lcm-30

90/30 -19/30

71/30

2 11/30