# In one week, a music store sold 9 guitars for a total of $3611. Electric guitars sold for $479 each and acoustic guitars sold for $339 each. How many of each type of guitar were sold?

Let: Electric=E Acoustic=A

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Let the number of electric guitars sold be (x) and the number of acoustic guitars sold be (y). You have two equations based on the information given:

- The total number of guitars sold is 9: (x + y = 9).
- The total revenue from the guitars is $3611: (479x + 339y = 3611).

To solve the system of equations, first solve one of the equations for one variable in terms of the other. Solving equation 1 for (y), we get (y = 9 - x).

Substitute (y = 9 - x) into the second equation:

(479x + 339(9 - x) = 3611).

Distribute and simplify:

(479x + 3051 - 339x = 3611),

(140x + 3051 = 3611),

(140x = 560),

(x = 4).

So, 4 electric guitars were sold. Substitute (x = 4) into (y = 9 - x) to find (y):

(y = 9 - 4 = 5).

Therefore, the store sold 4 electric guitars and 5 acoustic guitars.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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