Please help me:
Use Nn as the variable for the number of nickels and Nd as the variable for the numbler of dimes to write two equations that correspond to the following statement and solve for the Nn and Nd:

The number of nickels exceeds the number of dimes by 7. The total value of the coins is $1.55.

Nn+7=Nd

The other eqn is way too easy. "exceeds" just means +

I know I used that equation but my answer was WHACKO!

The first equation should be Nn = Nd + 7

maybe this is where you went wrong? We can't help you unless you give us your working, so we can see where you went wrong.

Capuchin:

Your right as always.

well this is what I have so far:

Nn=ND + 7
Nn+ND=1.55

ND+ND+7=1.55
2ND+7=1.55
But now it doesn't make sense because the answer would be negative is that right:?

Your second equation should be Nn*5 + Nd*10 = 155

Wait what?

The number of nickels* 5cents + the number of dimes * 10cents = 155 cents

It's not the number of coins that = 1.55, it's the value of the coins, which you hhavent accounted for.

Oh man I feel so stupid how could I miSS tHAT! Thanks so much!