posted by .

Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same total cost as before. What was the original price of each pen?

There are 41 pigs and chickens on a farm. If there are 100 legs counted altogehter, how many of each animal are there?

One day, 5/6 of the office staff came to work. If three more had been away, this fraction would have decreased to 3/4. How many people are on full staff?

Mrs. Grant was 20 when her eldest child, tess, was born. Carly was born 2 years later and Troy another 4 years later. Now the average of their four ages is 39. How old are Mrs. Grant and her three children?

1.

new price x cents
solve 10x = 12(15)

2. number of chickens --- x
number of pigs --- 41-x

solve : 2x + 4(41-x) = 100

3. number of people --- x
(5/6)x - 3 (3/4)x

4. let the number of year since Troy was born be x
Mrs. Grant = 20+6+x
Tess = 6+x
Carly = 4+x
Troy = x

solve : 26+x + 6+x + 4+x + x = 4(39)

Similar Questions

1. math

2x + 3y = 78 How do i solve for x and y? 2x=78 78/2=39 so x=39 3y=78 78/3=26 so y=26 Can't be, because 2(39)+ 3(26) does not equl 78 You need TWO equations when you have TWO variables, such as x and y. It can't be done with one equation.
2. 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 …
3. WORD PROBLEMS W/ EQUATIONS

Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same total cost as before. What was the original price of each pen?
4. Math

Mr. Badger bought 12 pens every month until their price rose to 15 cents each. Now he can only afford to buy 10 pens at the same total cost as before. What was the original price of each pen?
5. math

In a hypermarket promotional drive, the customers would only have to pay half of the original price on their second buy of the same item and one quarter of the original price on their third buy of the same item for some selected items. …
6. Math

In a store, pencils have one price and pens have another. 3 Pencils and 2 pens cost 78 cents. 2 pencils and 3 pens cost 72 cents. How much does 1 pencil and 1 pen cost?
7. 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?
8. Maths

A shopkeeper buys a number of blue pens and red pens. He pack 3 blue pens and 2 red pens into a packets for sale. If he wants to obtain 160 packets of the pens he needs another 25 blue pens. What is the total number of the pens bought …
9. Maths Year 10 Equations

A shopkeeper bought x pens for \$21. a) write down an expression, in terms of x, for the cost, in cents, of each pen b) the shopkeeper gave 2 pens to his sons and sold each of the remaining pens at 8 cents more than he paid for it. …
10. Algebra

A box contains blue and purple pens. There are 6 less than triple the number of blue pens as purple pens. A blue pen costs 20 cents and a purple pen cost 35 cents. The total value of all the pens is \$37.90. How many of each colour …

More Similar Questions