A can of paint will be 10 dollars. the rollers will also be 10 dollars. makes sense with 2 can being 20 and then a roller being 10 equaling 30 dollars. same with 3 cans being 30 and 2 rollers being 20 adding up to 50
All you do is change the mix number to and improper fraction. Add that once the denominator is the same then d divide it. Make the quotient as a decimal then add both decimal.