Question

Julie went to the post office and bought both $0.41
stamps and $0.26 postcards. She spent $51.40. The
number of stamps was 20 more than twice the number
of postcards. How many of each did she buy?

I just want to know how to set it up.

Answer 1

It's 100 multiplied by $ 0.41 + 40 multiplied by $ 0.26
If done right, You should have 41 + 10.4 = 51.40.
41*(stamps)+.26*(post)=51.4
1 stamp=20+2(post)
0.41*20+2(post)+.26=51.4
Post=40
stamps= 20+2x40

Answer 2

10