Posted by Sally on .
5 hockey pucks and three hockey sticks cost $23.
5 hockey pucks and 1 hockey stick cost $20. How much
does 1 hockey puck cost?

math 
Reiny,
p  cost of hockey stick
s  cost of hockey stick
5p + 3h = 23
5p + h = 20
subtract the two equations, it is easy after that.