Jake is now ¼ of his father’s age and in 7 years time his age will be 1/3 rd of his father. How old is Jake now?

Question

anonymous · Answer

uh huh

anonymous · Answer

1/4x

anonymous · Answer

can i show u how i did my equation and then u can correct me?

anonymous · Answer

(X+4x)=4(x+4)
Idk why I did that

anonymous · Answer

im kinda confused i dont know what i did

anonymous · Answer

i dont know where to add the 7

parthkohli · Answer

If Jake's father is $\rm f$, then Jake is $\rm {j \over 4}$. Agree?

anonymous · Answer

yes

parthkohli · Answer

Okay, and after 7 years, Jake's father will be $\rm f + 7$ right?

parthkohli · Answer

What I meant above was that Jake is $\rm f \over 4$

anonymous · Answer

yeah

parthkohli · Answer

Also, Jake will be $\rm {f \over 4} + 7$ right?

anonymous · Answer

yeah

parthkohli · Answer

Now you have that in 7 years, Jake will be 1/3rd of his father.

That means that if you multiply Jake's age in 7 years by 3, you get his father's age in 7 years.

anonymous · Answer

oh ok that makes sense

parthkohli · Answer

Making an equation for that,$$\rm 3\left({f \over 4} +7\right) = f + 7$$Get how I made this equation?

anonymous · Answer

yes i get it now thanx alot :)

parthkohli · Answer

You're welcome!

P.S: This question is actually not linear algebra... it's just algebra!

anonymous · Answer

oh really lol i didnt know that

parthkohli · Answer

Heh. I used to get confused too when I was a basic dude.

anonymous · Answer

man that makes me feel better haha

parthkohli · Answer

;0