Ben has 4 more than twice as many cd's as jake. if they have a total of 31 cd's, home cd's does jake have ?

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23-11-2016
Mathematics

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Ben has 4 more than twice as many cd's as jake. if they have a total of 31 cd's, home cd's does jake have ?

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garcialnatalia garcialnatalia · Answer 1 · 2016-11-23T23:30:46+01:00

garcialnatalia garcialnatalia

23-11-2016

These are the equations given:
31=B+J
B=2J+4

So you substitute B=2J+4 into 31=B+J

31=2J+4+J

Solve

31-4=3J+4-4
27=3J
27/3=3J/3
9=J

Jake has 9 cd's.

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QuentinSaxton QuentinSaxton · Answer 2 · 2019-01-17T00:18:32+01:00

QuentinSaxton QuentinSaxton

17-01-2019

Answer:

j = 9 (# of CDs Jake has)

Step-by-step explanation:

Equations::

b + j = 31 CDs

b = 2j+4

-----

Substitute for "b" and solve for "j"::

2j+4 + j = 31

3j = 27

j = 9 (# of CDs Jake has)

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