Posted by Lynnese on Wednesday, April 8, 2009 at 5:57pm.
Bobby has 12 coins.
he has 3 dimes, 6 pennies, and 3 quarters
How did you get your answer? Please explain it to me?
i used the equation: 1/2x+1/4x+3=x
then add 1/2x and 1/4x: 3/4x+3=x
then subtract 3/4x on both sides:3=1/4x
then divide by 1/4x: 12=x
-12 coins is the answer :)
1/2 + 1/4 = 3/4
so 3/4 of his coins must be made up of pennies and quarters.
so that means the remaining 1/4 must be dimes
But we know that he has 3 dimes
think this way: 1/4 of what number is 3 ?
or
3 divided by 1/4 is .... ?
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