jack bought 34 stamps at the post office.red stamps were $0.33 each and the blue stamps were $0.50 each.if the total cost of the stamps was 12.75,how many of each type did he buy?
Solve by substitution, isolate the variable r r=-b+34 Substitute into second equation 0.33(-b+34)+0.5b=12.75 Distribute -0.33b+11.22+0.5b=12.75 Collect like terms and isolate the variable 0.17b=1.53 Divide by 0.17 b=9
Subtract from 34 to get the number of red stamps 34-9=25
