SOLUTION:
the cost of 4 apples and 3 oranges is 1.25. the cost of 7 apples minus the cost of 2 oranges is 1.10 what is the cost of 1 apple and 1 orange
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Question 738398:
the cost of 4 apples and 3 oranges is 1.25. the cost of 7 apples minus the cost of 2 oranges is 1.10 what is the cost of 1 apple and 1 orange
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
4A+3O=1.25 MULTIPLY BY 2
7A-2O=1.10 MULTIPLY BY 3 & ADD.
8A+6O=2.50
21A+6O=3.30
------------------------
29A=5.80
A=5.80/29
A=$.20 COST OF 1 APPLE.
4*.20+3O=1.25
.80+3O=1.25
3O=1.25-.80
3O=.45
O=.45/3
O=$.15 COST OF 1 ORANGE.
PROOF:
7*.20-2*.15=1.10
1.40-.30=1.10
1.10=1.10
.20+.15=$.35 ANS. FOR THE COST OF 1 APPLE & 1 ORANGE.
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