SOLUTION: On​ Monday, Luis picked up seven scones and two large coffees for the office staff. He paid $22.04. On​ Tuesday, Rachel picked up four scones and three large coffees fo

Algebra ->  Expressions-with-variables -> SOLUTION: On​ Monday, Luis picked up seven scones and two large coffees for the office staff. He paid $22.04. On​ Tuesday, Rachel picked up four scones and three large coffees fo      Log On


   

Question 1119417: On​ Monday, Luis picked up seven scones and two large coffees for the office staff. He paid $22.04. On​ Tuesday, Rachel picked up four scones and three large coffees for the office staff. She paid $15.90. What is the cost of one​ scone? What is the cost of one large​ coffee?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
Typical application for system of two linear equations in two variables

VARIABLES:
n, price of scone,
c. price of large coffee

EQUATIONS:
system%287n%2B2c=22.04%2C4n%2B3c=15.9%29

Either use substitution method, or elimination method.