Question 334048
A baker made 20 pies. A Boy Scout troop buys one–fourth of his pies,
 a preschool teacher buys one–third of his pies, and a caterer buys one–sixth of his pies.
 How many pies does the baker have left?
:
Let p = no. of pies left over
:
p = 20 - {{{1/4}}}20 - {{{1/3}}}20 - {{{1/6}}}20
Multiply by 12 to get rid of the denominators
12p = 12(20) - 3(20) - 4(20) - 2(20)
:
12p = 240 - 60 - 80 - 40
:
12p = 240 - 180
:
12p = 60
p = {{{60/12}}}
p = 5 pies left over