A pear cost x cents . An orange cost y cents less than a pear. Find the cost of four pears and half of a dozen of oranges
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an apple costs a cents
cost of 5 apples = 5a
a pear costs b cents more tahn an apple
cost of 1 pear = a+b
cost of 7 pear =7(a+b)=7a+7b
cost of 5 apples and 7 pears =5a +7a+7b =12a+7b
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Answer:
Cost of a pear=x cents
Cost of an orange=(x-y) cents
Cost of 4 pears=4x cents
Half a dozen means 6 oranges
Cost of 6 oranges=6(x-y) cents
Total cost=Cost of 4 pears+Cost of 6 oranges=4x+6(x-y)=4x+6x-6y=10x-6y
Answer=10x-6y cents
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