Jamila paid $2.20 for 5 shark erasers and 1 keychain. Lucia paid $3.40 for 2 shark erasers and 6 keychains. How many cents did Hari pay for 1 shark eraser and 1 keychain?
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Given,
Price of 5 eraser and 1 keychain = $2.20
Price of 2 eraser and 6 keychain = $3.40
To find,
Price of 1 eraser and 1 keychain.
Solution,
We can simply solve this mathematical problem by using the following mathematical process.
Let, the price of 1 eraser = $ x
And, the price of 1 keychain = $ y
According to the data mentioned in the question
5x+y = 2.20
30x+6y = 13.20....(1)
And,
2x+6y = 3.40...(2)
Subtracting (2) from (1) we get that,
30x+6y-2x-6y = 13.20-3.40
28x = 9.80
x = 0.40
(2×0.40)+6y = 3.40
0.80+6y = 3.40
6y = 2.6
y = 0.43
Total price = ($0.40+$0.43) = $0.83 = 83 cents
Hence, he had to paid approximately 83 cents
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