Question 371699
Ms.Mynm bought 54 stamps for $12.00. She bought three times as many 39 cent stamps as 63 cent stamps, and the rest were 4 cent stamps. How many of each type did she buy?

63 cent         39 cent          4 cent
x                3x              54-(3x+x)
...
63x+39*3x+4(54-4x)=1200
63x+117x+216-16x=1200

164x+216=1200
164x=1200-216
164x=984
/164
x= 984/164
x= 6
39cent = 3x= 18
4 cent =(54-4x)=(54-24)=30
...
m.ananth@hotmail.ca