here is the problem...
Andrea has a collection of nickels, and Greg has a collection of dimes. The number of nickels Andrea has is four times the number of dimes that Greg has. Andrea has 80 cents more than Greg. Let one variable piece represent the number of dimes Greg has. What pieces represent the number of nickels Andrea has? How much money does Greg have?

Question

here is the problem...
Andrea has a collection of nickels, and Greg has a collection of dimes.  The number of nickels Andrea has is four times the number of dimes that Greg has.  Andrea has 80 cents more than Greg.  Let one variable piece represent the number of dimes Greg has.  What pieces represent the number of nickels Andrea has? How much money does Greg have?

mertsj · Answer

n-=4d
5n=10d+80

mertsj · Answer

Solve the system.

anonymous · Answer

ok thank you...but why is it n-
???

mertsj · Answer

The little minus sign is a typo.  Sorry

anonymous · Answer

whew ok thank!

anonymous · Answer

can you go a step farther with this so I can understand???

mertsj · Answer

In the second equation, replace n with 4d from the first equation.

anonymous · Answer

I got it !!!!!  Thank you SO SO SO SO much!!!!

mertsj · Answer

Excellent!!  yw