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goldfiish
2 months ago
9

Ben and Joel are raising money for their class trip by selling wrapping paper. Ben raised $43.50 by selling 12 rolls of solid pa

per and 9 rolls of printed paper. Joel raised $51.50 by selling 8 rolls of solid paper and 15 rolls of printed paper. Find the cost of each type of wrapping paper. PLEASE HELP QUICK!!
Mathematics
1 answer:
lawyer [12.5K]2 months ago
6 0

Detailed solution:

The price of solid paper is $1.75 each

Printed paper is priced at $2.50 each

Information provided:

Ben's total is $43.50 (12 rolls of solid paper and 9 rolls of printed paper)

Joel's total is $51.50 (8 rolls of solid paper and 15 rolls of printed paper)

Let x represent solid paper

Let y represent printed paper

The equations are: 12x + 9y = 43.50

 8x + 15y = 51.50

To find x:

8x + 15y = 51.50

Solving for x gives: 8x = 51.50 - 15y

Thus, x = (51.50 - 15y)/8

Next, substitute x:

12x + 9y = 43.50

Replacing x results in: 12(51.50 - 15y)/8 + 9y = 43.50

Which expands to: (618 - 180y)/8 + 9y = 43.50

Multiplying through by 8 yields: 618 - 180y + 72y = 348

Rearranging gives us: -108y = 348 - 618

This simplifies to: -108y = -270

Dividing by -108 results in: y = 2.50

Using the expression for x:

x = (51.50 - 15y)/8

Substituting y, we get: x = (51.50 - 15(2.5))/8

Thus, x = (51.50 - 37.50)/8

This simplifies to: x = 14/8

Final value is: x = 1.75

Verification: x = 1.75; y = 2.5

Substituting into the first equation: 12x + 9y = 43.50

12(1.75) + 9(2.5) = 43.50

Calculating gives: 21 + 22.50 = 43.50

This confirms: 43.50 = 43.50

Substituting into the second equation: 8x + 15y = 51.50

8(1.75) + 15(2.5) = 51.50

Calculating yields: 14 + 37.50 = 51.50

This also confirms: 51.50 = 51.50

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