Question

Felipe vasquez bought some 14 cents stamps and the same number of 22 cents stamps. he paid a total of $1.80 for all the stamps. how many of each kind did he buy?

Answer 1

`\\ \text{Let the number of each type stamps bought are x.}\\ \\ \text{so the amount paid to buy 14 cents stamps }=0.14 x\\ \\ \text{and the amount paid to buy the stamps costing 22 cents is}=0.22 x\\ \\ \text{now since he paid a total of }\$1.80 \text{ for all the stamps, }\\ \text{so we have}\\ \\ 0.14x+0.22 x=1.80\\ \\ \Rightarrow 0.36x=1.80\\ \\ \Rightarrow x=(1.80)/(0.36)\\ \\ \Rightarrow x=5`

Hence Felipe Vasquez bought 5 stamps of each kind.