Question

Question #567a6

Answer 1

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`