I have 150 nickels and dimes, I have 70 more nickels than di

gailsnana

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Oct 12, 2006
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I have 150 nickels and dimes, I have 70 more nickels than dimes. How many do I have of each coin?

I have tried substituting the 70 from 150 but that leaves me with 80 dimes. I just don't understand the formula to figure this out. Please help
 
I don't know what you mean by "substituting the 70 from 150"...? Did you maybe mean "subtracting"...?

How many of each sort of coin would you have, if you had equal amounts of each?

How many of each sort would you have, if you traded five dimes for five nickels? (That is, if you trade five coins, how big is the difference in the numbers of coins?)

How many of each sort would you have, if you traded ten dimes for ten nickels? (That is, if you trade ten coins, how big is the difference in the numbers of coins?)

Can you figure out from that how many dimes you need to switch for nickels?

Eliz.
 
Re: I have 150 nickels and dimes, I have 70 more nickels tha

gailsnana said:
I have 150 nickels and dimes, I have 70 more nickels than dimes. How many do I have of each coin?

I have tried substituting the 70 from 150 but that leaves me with 80 dimes. I just don't understand the formula to figure this out. Please help

"I have 70 more nickels than dimes":
Let d = dimes : then nickels = d + 70 ; follow that?

"I have 150 nickels and dimes":
then d + d + 70 = 150 ; still there?

So 2d = 150 - 70
Can you finish that, nana?
 
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