Question

9 years ago grandfather's age was 9 times his grandson age at that time after 15 years his age will with thrice has his grandsons age find their present ages ​

Answer 1

Step-by-step explanation:

answer grand grandfather is 45 years older than his grandson

Answer 2

Answer:

Let the age of grandson=y

Let the age of grandfather=x

Step-by-step explanation:

we know that:9 years ago

x-9=9(y-9)

x-9=9y-81

x-9y= -72........(1)

we know that:15 years later

x+15=3(y+15)

x+15=3y+45

x-3y=30...........(2)

with the help of ELIMINATION METHOD:

subtracting eq.2 from eq.1

x-9y=-72

-x+3y=-30

----------------------

-6y=-102

we get

y=17,

x=3y+30

x=51+30,x=81