SOLUTION: Linear Equation Problem Cookies are on sale! Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost you $2.80! (c is the varia

Algebra ->  Coordinate Systems and Linear Equations  -> Linear Equations and Systems Word Problems -> SOLUTION: Linear Equation Problem Cookies are on sale! Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost you $2.80! (c is the varia      Log On


   

Question 987886: Linear Equation Problem
Cookies are on sale! Today each cookie costs $0.75 less than the normal price. Right now if you buy 7 of them it will only cost you $2.80! (c is the variable for cookies)
Write an equation to determine the normal price of each cookie:
Find the normal price of each cookie:
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +p+ = the normal price of 1 cookie
in cents
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Today's price for 1 cookie:
+p+-+75+ cents
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The price of 7 cookies today:
+7%2A%28+p+-+75+%29+ cents
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+7%2A%28+p+-+75+%29+=+280+ ( in terms of cents )
+7p+-+525+=+280+
+7p+=+805+
+p+=+115+ cents
The normal price of 1 cookie is $1.15
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check:
+7%2A%28+115+-+75+%29+=+280+
+7%2A40+=+280+
+280+=+280+
OK