jimmy and shreya are selling paper for a school fundraiser

Question

jimmy sold 3 rolls of plain wrapping paper and 8 roll’s of shiny wrapping paper for a total of $172. shreya sold 1 roll of plain wrapping paper and 7 rolls of shining wrapping paper for a total if $144. find the cost of each of i one roll of plain quaking paper and one roll of shiny wrapping

Answer 1

3p + 8s = 172

p + 7s = 144

3p + 21s = 432

3p + 8s =172

13s = 260

s = $20 per roll of shiny wrapping paper

p = 144-140 = $4 per roll of plain wrapping paper