SOLUTION: you sell 10 times as many cupcakes as your friend. the difference of your sales is 81. how many cupcakes did you sell? how many did your friends sell?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: you sell 10 times as many cupcakes as your friend. the difference of your sales is 81. how many cupcakes did you sell? how many did your friends sell?      Log On


   

Question 1062925: you sell 10 times as many cupcakes as your friend. the difference of your sales is 81. how many cupcakes did you sell? how many did your friends sell?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
x,y for self, friend

system%28x=10y%2Cx-y=81%29

%2810y%29-y=81
9y=81
y=9

system%28x=90%2Cy=9%29