Question

Frank is four years older than bill. Six years ago, he was twice as old as Bill. how old is frank now?

Answer 1

Let, the age of Frank is f and that of Bill is b (at present).

Answer 2

Now, it is given that Frank is 4 years older than Bill, so,

f = 4b

Answer 3

Ohh sorry that was f = 4 + b

Answer 4

ok

Answer 5

Good , now 6 years ago what would have been the ages of Frank and Bill ?

Answer 6

They would be:

Age of Frank = f - 6
Age of Bill = b - 6

Got it ?

Answer 7

ya i am just bad at like substituting and eliminating

Answer 8

Its okay.

Answer 9

Now the question says:

"Six years ago, he(that is Frank) was twice as old as Bill"

Answer 10

f-6=2(b-6)

Answer 11

Very nice.

Answer 12

Now can you solve this?

Answer 13

thats the part I'm stuck on

Answer 14

Its ok

Answer 15

(f-6) = 2(b-6)

=> f - 6 = 2b - 2*6

=> f - 6 = 2b - 12

=> f = 2b - 12 + 6

=> f = 2b - 6

Do you get this part ?

Answer 16

ooooo okkk i see wat i got wrong thank u!!

Answer 17

No problem.

Answer 18

Now, we have two equations :

f = 4 + b

and f = 2b - 6

Now, lets see if we can solve them.

Answer 19

What I am going to do is , I am going to take value of "f" from 1st equation and going to put it in 2nd equation. Okay ?

Answer 20

@dbaseball You there ?