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Answer:
$3
Step-by-step explanation:
The difference in the amounts doesn't change when each girl is given the same gift. That difference is $5. If Jane ends up with twice the amount her sister has, and that is $5 more, then Jane ends up with $10 and her sister ends up with $5.
$3 was given to each girl.
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If x is the amount given to each girl, the equation can be ...
(x+7)/(x+2) = (2)/(1)
x +7 = 2x +4 . . . . multiply by (x+2)
3 = x . . . . . . . . subtract x+4
$3 was given to each girl.
