Question

Five years ago anu was thrice as old as sonu . After
ten years,anu will be will be twice old as sonu. How old
are anu, and sonu?​

Answer 1

Answer:

According to the question:

x – 5 = 3(y – 5)

x – 5 = 3y – 15

x= 3y-15+5

x= 3y -10……………….. (1)

Again, as per question;

x + 10 = 2(y + 10)

x + 10 = 2y + 20

x – 2y = 10

(3y – 10) – 2y = 10 (from equation 1)

3y-2y =10+10

y= 20

Substitute, y=20 in equation 1,

x = 3(20) -20

x =60 – 20

x = 50

Hence, the present ages of Anu is 50 years and of Sonu is 20 years.

Step-by-step explanation:

Hope it helpful for you

Answer 2

Answer:

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Step-by-step explanation:

let the present age of anu be x years and that of sonu be y years

according to the first condition

x-5=3(y-5)

ie x-5=3y-15

ie x=3y-10 (1)

according to the second condition

x+10=2(y+10)

ie x+10=2y+20

ie x=2y+10 (2)

equate (1) and (2)

we get

2y+10=3y-10

ie y=20

substitute value of y in any of two equations

we get

x=50

thus present age of anu is 50 years and that of sonu is 20 years