Answers

2016-04-17T12:02:17+05:30
Let the numbers be 4x and 7x
so, (20+4x)/(20+7x)=7/9
(20+4x)9=7(20+7x)
180+36x=140+49x
40=13x
x=40/13

so, the numbers are
4x=4*(40/13)=160/13
7x=7*(40/13)=280/13
0
2016-04-17T13:00:53+05:30

let no. be x

4x+20/7x+20 = 7/9                 (cross multiplying)

9(4x+20) = 7(7x+20)

36x+180 = 49x+140

180-140 = 49x-36x
40 = 13x

x=40/13


so, the numbers are
4x=4*(40/13)=160/13
7x=7*(40/13)=280/13
0