Question

pls solve this with full explanation this is ratio and proportion ​

Answer 1

Answer:

7

Step-by-step explanation:

Let the no. be x wich can be added.

Now,

According to the ques.,

(2+x)/(3+x) = 9/10

Or, 10(2+x) = 9(3+x)

Or, 20 + 10x = 27 + 9x

Or, 10x-9x = 27-20

Or, x = 7

Henc,req. no. is 7

• Hope it will help you. :)