There is same number of pennies, nickels, and dimes in a wallet. Together they make $1.28. How many coins are there in the walle t?
2 answers:
A = amount .01a + .05a + .1a = 1.28 Combine like terms. .16a = 1.28 Divide both sides by .16. a = 8 8 * 3 = 24 There are 24 coins in the wallet.
We call the number of each kind of coins: a We have the total money is a+ 5a+ 10a= 16a We have an equation 16a= $1.28 or 16a=128 and we have a= 8 And there are 8x3=24 coins have fun
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When X = 24
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