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anygoal [31]
3 years ago
10

Brett has a $30 online gift voucher. He plans to buy as many books as he can. The cost of each book is s4. There is also a singl

e shipping charge of $2. How many books can he afford without spending more than his gift voucher amount?
Mathematics
2 answers:
murzikaleks [220]3 years ago
4 0
Well, 4 times 7 is 28 and then plus 2 is 30! Therefore, he buy at the most 7 books.
Dima020 [189]3 years ago
4 0

General Idea:

When we are working with word problems, we need to follow the below steps:

<u>Step 1:</u> Assign variable for the unknown that we need to find.

<u>Step 2:</u> Write a meaningful mathematical equation using the sentence given

<u>Step 3:</u> Solve the equation by Performing reverse operation by Undoing whatever is done to the variable. Solving means find the value of the variable which will make the equation TRUE.

Applying the concept:

Step 1: Let x be the number of books that Brett can afford without spending more than his gift voucher amount.

Step 2: Writing mathematical equation based on the given sentence "Brett has a $30 online gift voucher. He plans to buy as many books as he can. The cost of each book is $4. There is also a single shipping charge of $2"

Online \; Gift \; Voucher=Number \; of  \; books  \; \times  \; Cost\;per \; Book \; + \; Single \; shipping \; charge

30=4x+2

Step 3: Solving equation

4x+2=30\\ Subtract \; 2 \; on \; both \; sides\\ \\ 4x+2-2=30-2\\ Combine \; like \; terms\\ \\ 4x=28\\ Divide  \; 4 \; on \; both \; sides\\ \\ \frac{4x}{4}= \frac{28}{4} \\ Simplifying  \; fraction \; on \; both \; sides\\ \\ x=7

Conclusion:

The number of books that Brett can afford without spending more than his gift voucher amount is <u>7</u> !!


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<h3>Answer:</h3>

5

<h3>Solution:</h3>
  • First, n*7 can be written as 7n.
  • Then, 7*5 is equivalent to 35.
  • So we have
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  • In order to find the value of n, we need to divide both sides by 7:
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Hope it helps.

Do comment if you have any query.

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