On a recent trip to the convenience store, you picked up 3 gallons of milk, 4 bottles of water, and 8 snack-size bags of chips. your total bill (before tax) was $21.30. if a bottle of water costs twice as much as a bag of chips, and a gallon of milk costs $1.60 more than a bottle of water, how much does each item cost?
Accepted Solution
A:
To find the answer you will write and equation in terms of the cost of a bag of chips.
3(cost of milk) + 4 (cost of water) + 8 (cost of bag of chips) = $21.30 3 (2c +1.60) + 4 (2c) + 8 (c) = $21.30 ; Simplify 6c + 4.80 + 8c + 8c = 21.30 22c + 4.80 = 21.30 - 4.80 -4.80 22c = $16.50 22 22 c = 0.75