## calculusxy one year ago MEDAL!!! If q + r + s = 117, and q = s = 4r, then r = A. 13 B. 18 C. 30 D. 42 E. 54

1. calculusxy

@Nnesha

2. Nnesha

q =s =4r so you can substitute q and s for 4r

3. Nnesha

q = 4r s = 4r q=s

4. calculusxy

can i substitute numbers from the choices to r?

5. Nnesha

well you can solve for r that would be easy but yea you can :=) $\huge\rm \color{ReD}{q} + r + \color{ReD}{s} = 117$ $\huge\rm \color{ReD}{4r} + r + \color{ReD}{4r} = 117$

6. calculusxy

why did you leave r single?

7. Nnesha

given is  q = s = 4r solve for r we have to solve for r

8. calculusxy

okay thank you. I have another question. can you help?

9. Nnesha

i will try