Question

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! Write an equation to determine the normal price of each cookie. Find the normal price of each cookie.

Answer 1

The price of each cookie is $ 1.15.

Explanation:

Let x be the normal price of each cookie,

Since, each cookie costs $0.75 less than the normal price,

Thus, the new price of each cookie = ( x - 0.75 ) dollars,

So, the price of 7 cookies = 7( x-0.75 ) dollars

According to the question,

The price of 7 cookies = $ 2.80

⇒ 7( x-0.75 ) = 2.80

Which is the required equation to determine the normal price of each cookies,

For solving the above equation,

Divides both sides by 7,

x - 0.75 = 0.4

Adding 0.75 on both sides,

x = 1.15

Hence, the price of each cookie is $ 1.15.

Answer 2

Ok, let us use "C" as our variable that will equal the normal price.

(C - $.75) 7 = $2.80

Divide both sides of equation by 7
C - $.75 = $2.80 / 7 Add $.75 to both sides of equation

C = $.40 + $.75

C = $1.15