SOLUTION: Alexandra purchases 2 doughnuts and 3 cookies at a doughnut shop and is charged $3.30. Briana purchases 5 doughnuts and 2 cookies at the same shop for $4.95. All the doughnuts have
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Question 676705: Alexandra purchases 2 doughnuts and 3 cookies at a doughnut shop and is charged $3.30. Briana purchases 5 doughnuts and 2 cookies at the same shop for $4.95. All the doughnuts have the same price, and all the cookies have the same price. What is the cost, in dollars, of each doughnut?
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
2D+3C=3.30 MULTIPLY BY -2.5 & ADD.
5D+2C=4.95
-5D+-7.50C=-8.25
----------------------
-5.5C=-3.30
C=-3.30/-5.5
C=$.60 FOR EACH COOKIE.
2D+3*.60=3.30
2D+1.80=3.30
2D=3.30-1.80
2D=1.50
D=1.50/2
D=$.75 FOR EACH DONUT.
PROOF:
5*.75+2*.60=4.95
3.75+1.20=4.95
4.95=4.95
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