# algebra

posted by .

An office supply store sells pens for \$3 and notebooks for \$5. Before school started, the store sold 12 more pens than notebooks and made \$324. Which system of equations could be used to find the number of pens, p, and notebook, n that the store sold that day?

• algebra -

P = N + 12

5N + 3P = 324

Substitute N+12 for P in second equation and solve for N. Insert that value into the first equation and solve for P. Check by inserting both values into the second equation.

## Similar Questions

1. ### math

A salesperson bought a caase of pens.On Monday, he sold 1/2 of the pens.On Tuesady, he sold 30 more.On Wednesday, he sold 1/3 of the pens that were left.On Thursday, he sold the remaining 40 pens.How many pens were originally in the …
2. ### pre algebra

A college bookstore ordered 6 boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in the box?
3. ### math

At the school store, 5 pens sell for \$1.25. Which proportion will help find the cost of 12 pens?
4. ### algebra

A college bookstore ordered six boxes of red pens. The store sold 37 red pens last week and 67 red pens this week. 4 pens were left on the shelf. How many pens were in each box?
5. ### math

a number of teachers were to receive 6 pens each ,but needed 4 more pens for them to be equally divided.if each teacher received 9 pens, 25 more pens would be necessary.how many pens are there
6. ### math

A college bookstore ordered six boxes of red pens. The store sold 32 red pens last week and 35 red pens this week. Five pens were left on the shelf. How many pens were in each box?
7. ### Quick Math Help

The school store sells pens for \$2.00 and notebooks for \$3.00. You have \$60 to spend at the store. How many notebooks can you buy if you have already bought 10 pens?
8. ### algebra

A pet boarding facility wants to build two adjacent pens of equal size. They are using the length of the dog kennel as one side of the two pens. They have 324 feet of fencing to build the pens. What width should he make the pens to …
9. ### Math

An office manager bought 16 boxes of pens, each containing z pens. Workers took 10 pens from the supply room. How many pens were left?
10. ### math

A shopkeeper bought pens at a rate of 12 pens for 150 rs and sold them at rate of 10 pens for 130rs.The number of pens he should sell to earn a net profit of 20rs is?

More Similar Questions