Your piggy bank has a total of 46 coins in it; some are dimes and some are quarters. If you have a total of $7.00, how many quarters and how many dimes do you have?

I got this so far:
d+q=46
I don't know what the second problem should be.

Question

Your piggy bank has a total of 46 coins in it; some are dimes and some are quarters. If you have a total of $7.00, how many quarters and how many dimes do you have? 

I got this so far:
d+q=46
I don't know what the second problem should be.

anonymous · Answer

yeah your equation is correct
d+q = 46
which gives d = 46-q

now use the dollar value given
d*10 + q*25 = 700
so (46-q)*10 + q*25 = 700

Solve for q
get d from q