SOLUTION: a coins collection consists of 4, 2, and 3 cent coins. the number of 2 cent coin is one less than twice the number of 4 cent coins. the number 3 cent coins is five more than the n

Question 21518: a coins collection consists of 4, 2, and 3 cent coins. the number of 2 cent coin is one less than twice the number of 4 cent coins. the number 3 cent coins is five more than the number of 2 cent coins. the total value of all coins is $3.00 find the number of 2 cent coins in the collection.
Answer by wuwei96815(245) (Show Source): You can put this solution on YOUR website!
This is a two part problem. First, let's write expressions that show the numbers of each coin.
x= 4 cent coins
2x-1= 2 cent coins
2x+4= 3 cent coins

Now, we have to write an equation that shows the value of the coins.
$0.04(x) + $0.02(2x-1) + $0.03(2x+4) = $3.00
.04x + .04x-.02 + .06x+.12 = 3.00
.14x+.10 = 3.00
.14x = 2.90
x = 20.7

Obviously, I didn't get the right answer. Can someone help me out? Where did I go wrong? Is the problem correctly stated?
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