0
If 15 pens and 20 pencils cost as much as 20 pens and 15 pencilshow do you compare the costs of two?
Wiki User
∙ 14y ago
this is a simple question that requires a little bit of substitution. before making hte 2 equations, we need to define our two unknowns, so let x= cost of pens y= cost of pencils therefore 15x + 20y= 20x = 15y -5x = -5y therefore x=y Hence, the cost of the pens and the pencils is the same.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
Pencils cost 5p each How much would 14 pencils cost?
Costs 70p
A package of 25 pencils costs 5.75 how much does each pencil cost?
5.75/25 = £0.23
How much will four pencils cost if six pencils cost 1.68?
$1.12
If 12 pencils cost 1.44 how many would 4 pencils cost?
I'll represent the cost of a pencil by the variable p.12p=1.44p=1.44/12p=0.12So 4 pencils would cost:4p=0.12*44p=0.48
If the cost of 3 markers and 2 pencils is 1.80 what is the cost of 1 marker?
Markers are .50cents each Pencils are .15 cents each
Pencils cost 5p each How much would 14 pencils cost?
Costs 70p
A package of 25 pencils costs 5.75 how much does each pencil cost?
5.75/25 = £0.23
What is the cost of p pencils if pencils cost 20 each and pens cost 30 each?
The cost of p pencils is 20p.
Where can someone compare the cost of flights?
Someone can compare the cost of flights at any time. There are apps that will assist a person. FareCompare is a great option for people that wish to compare flight costs.
How much will four pencils cost if six pencils cost 1.68?
$1.12
If pencils cost 0.26 each could you buy four pencils with 1.00?
If pencils cost 0.26 each could you buy four pencils with 1.00?
How much would 12 pencils cost if 1 costs 10 cents?
12 x 10 = 120 cents (Or 1 dollar 20 cents.)
If 12 pencils cost 3.00. How many can you get wit 4.50?
Eighteen pencils !
If 12 pencils cost 1.44 how many would 4 pencils cost?
I'll represent the cost of a pencil by the variable p.12p=1.44p=1.44/12p=0.12So 4 pencils would cost:4p=0.12*44p=0.48
What is the average cost of a wind turbine?
About 50p i think that it costs £1.50 The average cost doesn't even count here and doesn't come close to the cost of our electricity bill. If we compare $1.5-2.2 as average cost of a wind turbine, then just compare it to the av. cost of your electricity bill!
If the cost of 3 markers and 2 pencils is 1.80 what is the cost of 1 marker?
Markers are .50cents each Pencils are .15 cents each
If four pencils cost p what is the cost of one?
p/4
