Question

the age of A2B are in the ratio 5:7 four years from now the ratio of the ages will be 3:4 .find the present age of A2B​

Answer 1

Answer:

⇒ 4(5x+4)=3(7x+4)

\Rightarrow\ 20x+16=21x+12⇒ 20x+16=21x+12

\Rightarrow\ 20x-21x=12-16⇒ 20x−21x=12−16

\Rightarrow\ -x=-4⇒ −x=−4

\Rightarrow\ x=4⇒ x=4