SOLUTION: A house wife find that 5vcans of condensed milk and 3 jars of instant coffee cost $27 while 12 cans of condensed milk and jars of instant coffee cost $49.40.find the total cost for
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Question 1115493: A house wife find that 5vcans of condensed milk and 3 jars of instant coffee cost $27 while 12 cans of condensed milk and jars of instant coffee cost $49.40.find the total cost for 7 cans of condensed milk and 2 jars of instant coffee?
The bill for 6 cups of coffee and 7 cups of tea is $5.90 while the bill for 18 cups of coffee and 5 cup of tea is $9.70.find the total bill for 7 cups of coffee and 6 cups of tea?
A man bought 8 kiwi fruits and 7 pears for $4.10 while another man bought 4 kiwi fruits and 9 pears for $3.70.What is the cost of each kiwi fruit and each pear?
You can put this solution on YOUR website! 12 cans of condensed milk and how many jars of instant coffee?
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6 cups of coffee and 7 cups of tea $5.90
18 cups of coffee and 5 cup of tea $9.70
find 7 cups of coffee and 6 cups of tea
:
6x + 7y = 5.90 multiply all times 3:
18x + 21y = 17.70 (1)
18x + 5y = 9.70 subtract this equation from (1):
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18x + 21y = 17.70
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18x + 5y = 9.70
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0x + 16y = 8
16y = 8
y = 0.50 tea is 0.50 per cup
6x + 7y = 5.90
6x + 7(0.50) = 5.90
6x + 3.50 = 5.90
6x = 2.40
x = 0.40 coffee is 0.40 per cup
Now you find the cost of 7 cups of coffee and 6 cups of tea. Use your calculator.
The process is the same for all 3 problems, follow my work to solve the other two.
Happy learning,
John
