SOLUTION: joe spent 7.70$ on some 22-cent and 40-cent stamps.if he bought 26 stamps in all, use the simultaneous equation method to find how many stamps of each type he bought
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Question 969235: joe spent 7.70$ on some 22-cent and 40-cent stamps.if he bought 26 stamps in all, use the simultaneous equation method to find how many stamps of each type he bought Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! joe spent 7.70$ on some 22-cent and 40-cent stamps.if he bought 26 stamps in all, use the simultaneous equation method to find how many stamps of each type he bought
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Quantity:: t + f = 26 stamps
Value::::22t +40f = 770 cents
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Modify for elimination:
11t + 20f = 385
11t + 11f = 11*26
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9f = 99
f - 11 (# of 40 cent stamps bought)
t = 26-11 = 15 (# of 22 cent stamps bought)
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Cheers,
Stan H.
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