Mariko has 30 nickels and dimes. She has 12 more nickles than dimes. How many dimes does mariko have?

18

Step-by-step explanation:

So first, you can do like 30 lines, 30 circles, whatever you want as long as there is 30 of it. Moving on, you would count 12 of whatever you drew, for me I did lines. So, out of the 30, I boxed in 12. The rest is your ) For a more simpler way, just do 30-12 lol. Hope you do good! :)

It is 18

Step-by-step explanation:

subtract 12 from 30.