Melinda has nickels and dimes in her bank. She has four fewer nickels than quarters. She has $3.70 in the bank. How many coins of each type does she have. I need to know haw to set up the equation.

x=nickels=0.05
x-4x=four fewer nickels
+4x=quarters-0.25

x-4x+4x

Are you going to help me solve the problem I just submitted?

I would prefer if you change the way you attempted it a bit and retry.

Let x be the number of nickels and y be the number of dimes.

The net value of the nickels is 0.05x and the net value of the dimes is 0.1y

That is: if you have 5 nickels, their value would be 0.05(5) = 0.25.

I think that you meant dimes in the second sentence? Taking it as such, that means that y is greater than 4 by 4, or:
x + 4 = y

You need to add 4 to the nickels so that they equal the number of dimes.

Their total value is:
0.05x + 0.1y = 3.70

Can you try again?