Question

Christine , Kareem , and trey have a total of $79 in their wallet. Christine has $7 more than Kareem trey has 2 times what Kareem has . how much does each have?

Answer 1

Answer:

Christine: $25

Kareem: $18

Trey: $36

Step-by-step explanation:

Variables:

c = amount of money Christine has

k = amount of money Kareem has

t = amount of money Trey has

c = 7 + k

t = 2k

total amount of money = $79 = c + k + t

Write the equation in terms of k:

79 = (7 + k) + k + 2k

79 = 7 + 4k

72 = 4k

k = 18

Kareem has $18.

Since we found how much money Kareem has, we can find how much money everyone else has:

c = 7 + k

c = 7 + 18

c = $25

Christine has $25

t = 2k

t = 2(18)

t = $36

Trey has $36

Check to make sure the sum of all three people's money is $79:

18 + 25 + 36 = 79