Question #567a6

1 Answer
Dec 19, 2017

Jennie has $21, Sabrina has $42, and Pristina has $14

Explanation:

Assume that Jennie has = $x
Then, Sabrina will have = $2x (because Sabrina has twice the amount as that of Jennie)
and, finally Pristina will have = x-7 (because she has $7 less than Jennie)

Now, all of them together have = $77

It can be written in equation form as:
x+2x+(x-7) = 77

or x+2x+x-7 = 77

after combining all x terms the equation will become:
4x-7 = 77
or 4x = 77+7
or 4x = 84
or x = cancel84^21/cancel4^1

Therefore, Jennie has = $21
Sabrina has twice that of Jennie = 2xx$21 = $42
and, Pristina has $7 less than Jennie = $21-7 = $14

To check the answer, add all the amounts to see if totals to $77 and it is $21+$42+$14 = $77