Find (3a + 3b)/(a - b) when a/b = 2/5

[blunted]

Homework Statement

Calculate: (3 a + 3 b)/(a - b) If a/b = 2/5

No attempts, I don't know how to solve this.

Help?

 

[tiny-tim]

welcome to pf!

hi blunted! welcome to pf!

a/b = 2/5

hint: so a = … ?

 

[blunted]

Oh my god :D

Thanks for the hint and the welcome :)

 

[blunted]

K + l + m = 34.
K/l = 1/4
l/m = 1/3

l = ?

Is it 8 ?

 

[tiny-tim]

maybe it is and maybe it isn't

show your calculations! ​

(same hint as before, btw)