Please help me set up an equation!

Your piggy bank has a total of 43 coins in it; some are dimes and some are nickels. If you have a total of $3.60, how many dimes do you have?

Once I have an equation I'm pretty sure I will be able to solve it, I just need help making the equation

Question

Please help me set up an equation! 

Your piggy bank has a total of 43 coins in it; some are dimes and some are nickels. If you have a total of $3.60, how many dimes do you have?

Once I have an equation I'm pretty sure I will be able to solve it, I just need help making the equation

johnweldon1993 · Answer

Well we know there are dimes and nickles that make up those 43 coins...so

$$\large D + N = 43$$

We know that a dime is .10 and a nickle is .05....and the total is 3.60...so

$$\large .10D + .05N = 3.60$$

anonymous · Answer

okay! Thank you!

johnweldon1993 · Answer

No problem!

anonymous · Answer

Sometimes calculating in pennies may be easier.$$\{d+n=43,10d+5n=360\}$$$$\{d=29,n=14\} $$

johnweldon1993 · Answer

Yeah thats true too lol...if you don't like working with decimals....multiply the second equation by 100 to make whole numbers lol