At a school supply store, binders cost $5 and pencil pouches cost $2. in one day, 42 of these items are sold for total sales of $144. which system represents this (b represents binders and p represents pencil pouches), and how many binders were sold?

Part 1) The system of equations that represent this situation is equal to

b+p=42  and 5b+2p=144

Part 2) 20 binders were sold

Step-by-step explanation:

Let

b > the number of binders sold

p > the number of pencil pouches sold

Part 1)

we know that

The system of equations that represent this situation is equal to

b+p=42

5b+2p=144

Part 2) How many binders were sold?

we have

b+p=42

p=42-b > equation A

5b+2p=144 > equation B

substitute equation A in equation B

5b+2(42-b)=144

5b+84-2b=144

3b=144-84

3b=60

b=20 binders

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step-by-step explanation: