Julie went to the post office and bought both 41-cent stamps and 26-cent 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? stamps= ? postcards= ?

Stamps = 100, Postcards = 40

100 x 0.41 cents + 40 x 0.26 cents = $41 + $10.4 = $51.4

Solution

$0.41 x STAMPS + $0.26 x POSTCARDS = $51.4

1 STAMP = 20 + 2 x POSTCARDS

$0.41 x (20 + 2 x POSTCARDS) + $0.26 POSTCARDS  = $51.4

POSTCARDS = 40

STAMPS = 20 + 2 x 40 = 100

its 50 miles away from the starting point