work out and show the working please:
1)A pen costs twice as much as a book while a set costs $2,000 more than a book. If the cost of the three items is $ 11,000. Find the cost of each item?
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let the price of pen be rs 2y
let the price of book be rs y
let the price of a set of pen be rs 2000+y
Therefore
2y+y+2000+y= 11000
4y = 9000
y= 2250
Therefore,
price of pen = 4500
price of set of pen = 4250
price of book = 2250
let the price of book be rs y
let the price of a set of pen be rs 2000+y
Therefore
2y+y+2000+y= 11000
4y = 9000
y= 2250
Therefore,
price of pen = 4500
price of set of pen = 4250
price of book = 2250
Answered by
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Answer:
Cost of pen = 2x
Cost of book = x
Cost of set = x+ 2,000
total cost = 11,000
total cost = 2x+x+(x+2,000)
= 4x+2,000
4x+2,000 = 11,000
4x = 11,000-2,000
4x = 9,000
x = 9,000/4
x= 2250
Cost of pen = 2x
Cost of book = x
Cost of set = x+ 2,000
by putting value of x i.e 2250
so cost are
4500
2250
5250
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