Question

The total cost for a week at camp is $250. You have $159.

You earn $13 for every item you sell in a fundraiser. How
many items do you need to sell to pay for a week at camp?
(1) Type the equation you will use to solve the problem.
Use n to represent the number of items. (Please show how
you solved this on your paper.)
(2) What is the value of n?

Answer 1

250 = 159 + 13n

n = 7

Explanation:

the equation is 250 = 159 +13n because the total cost is 250 and you have 159 dollars already you just need to sell n amount of items for 13 dollars

how to get n:

250 = 159 + 13n

250 - 159 = 91 (what you need to earn)

91 ÷ 13 = 7 (what you need to earn divided by how much money each item costs)

n=7 (how many items you need to sell)

Answer 2

(1)
`159+13n=250`

(2)
`n=7`

Explanation:

(1) Make an equation where the total amount of money you have ($159) is added to the cost of an item ($13) multiplied by the unknown number of items (n). Set this equal to the amount you need ($250):

`159+13n=250`

(2) Solve for n. Use inverse operations to isolate the variable. Subtract 159 from both sides of the equation:

`159-159+13n=250-159\\\\13n=91`

Now divide both sides by 13 to isolate the variable, n:

`(13n)/(13)=(91)/(13)\\\\ n=7`

The number of items you need to sell if:

You need a total of $250

And you have $159

Is 7.

:Done