SOLUTION: Bob was given $9 to buy 6-cent and 8-cent stamps. He returned from the post office with 113 stamps and $1.46 in change. How many stamps of each kind did he buy/

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Bob was given $9 to buy 6-cent and 8-cent stamps. He returned from the post office with 113 stamps and $1.46 in change. How many stamps of each kind did he buy/      Log On


   

Question 386739: Bob was given $9 to buy 6-cent and 8-cent stamps. He returned from the post office with 113 stamps and $1.46 in change. How many stamps of each kind did he buy/
Answer by armstrkl(28) About Me  (Show Source):
You can put this solution on YOUR website!
let x = # of 6 cent stamps, let y = # 8 cent stamps
Solve the system:
.06x + .08y = 7.54 represents total cost to Bob
x + y = 113 represents the # of stamps total
Solution:
Solved by pluggable solver: Linear System solver (using determinant)
Solve:


Any system of equations:


has solution

or



(x=75, y=38}



75 6 cent stamps, 38 8 cent stamps