SOLUTION: Three oranges cost half of what nine apples cost. If one orange and one apple together cost 30 cents how much does one orange cost. This question is not from a textbook-the instr

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Question 88809: Three oranges cost half of what nine apples cost. If one orange and one apple together cost 30 cents how much does one orange cost.
This question is not from a textbook-the instructor gave it to us.
A+O=.30 THEN A=.30-O
3O=9A/2
3O=9(.30-O)/2
3O=(2.7-9O)/2
3O=(2.7-9O)/2
6O=2.7-9O
60+9O=2.7
15O=2.7
O=2.7/15
O=.18 FOR EACH ORANGE.
A=30-18
A=12.
PROOF
3*.18=9*.12/2
.54=1.08/2
.54=.54

Found 2 solutions by checkley75, lammy60:
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
A+O=.30 THEN A=.30-O
3O=9A/2
3O=9(.30-O)/2
3O=(2.7-9O)/2
3O=(2.7-9O)/2
6O=2.7-9O
60+9O=2.7
15O=2.7
O=2.7/15
O=.18 FOR EACH ORANGE.
A=30-18
A=12.
PROOF
3*.18=9*.12/2
.54=1.08/2
.54=.54

Answer by lammy60(2) About Me  (Show Source):
You can put this solution on YOUR website!

3O=9A/2
3O=9(.30-O)/2
3O=(2.7-9O)/2
3O=(2.7-9O)/2
6O=2.7-9O
60+9O=2.7
15O=2.7
O=2.7/15
O=.18 FOR EACH ORANGE.
A=30-18
A=12.
PROOF
3*.18=9*.12/2
.54=1.08/2
.54=.54
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