Joel has twice as many CDs as Mariella has. Subtracting 7 from the number of CDs Joel has and dividing by 3 equals the number of CDs Blake has. If Blake has 25 CDs, how many CDs does Mariella have?

We can write each of the statements as an equation

Joel j has twice the number of CDs as Mariella m, hence

j=2m

Joel's number of CD's - 7 divided by 3 equals the number of CDs Blake b has:

28j-729 2F3=b

Blake has 25 CDs

b=25
Substituting (3) into (2) gives:
%28j-7%29%2F3=25
j-7=3x25

j-7=75
j=75%2B7
j=82
So Joel has got 82 CD's
Based on equation (1) we can calculate the number of CD's Mariella has:
82=2m
m=82%2F2
m=41
Mariella has 41 CDs
Joel has 82 CDs
Blake has 25 CDs
;

Answered by sadlife21 | 2024-06-12

j = number of cd's joel has m = number of cd's mariella has b = number of cd's blake has
from problem statement, develop equations: j = 2m b = (j - 7)/3 = 25 m = ?
solve for m
b = 25 = (j - 7)/3 25 = (j - 7)/3 25*3 = j - 7 75 + 7 = j j = 82
j = 2m = 82 m = 82/2 m = 41
thus mariella has 41 cd's joel has 82 cd's blake has 25 cd's

Answered by Anonymous | 2024-06-24

Mariella has 41 CDs. Joel has 82 CDs while Blake has 25 CDs. Using the given relationships, we set up equations to find the amounts each person has.
;

Answered by Anonymous | 2024-10-02