Jamal invites 15 people to his birthday party and orders enough cupcakes so that everyone (himself included) will get two cupcakes. How many cupcakes can everyone have if only 7 friends show up to Jamal's party?

You go to the store and buy x bags of carrots and y bananas. Each bag of carrots costs $1.50 and each banana is $0.25. You spend $6.50. The total number of items you purchase is 11. How many bags of carrots did you buy? How many bananas did you buy?

Turn the word equation into symbols.

The product of three and s and the difference of 12 and 7 is 14.

Combined, Megan and Kelly worked 60 hours. Kelly worked twice as many hours as Megan. How many hours did they each work?

Sarah earns $10 an hour selling calculators, and every time she sells a calculator, she earns an additional $3 comission. Jamie also sells calculators, and earns $30 an hour, but only earns an additional $1 comission for every calculator she sells.

How many calculators per hour on average would Sarah have to sell to be making as much as Jamie would per hour, if Jamie sold the same number of calculators?

Jamarcus has twenty-one coins in his piggy bank, all of which are either dimes or quarters. If Jamarcus has in total, how many of each coin does he have?

There are a total of 14 coins when dimes and nickels are combined. The total amount is 80 cents. How many dimes and nickels are there, respectively?

Michael and Tom are brothers. Their combined age is 20, and Tom is 4 years older than Michael. What are Michael and Tom's ages?

The sum of two numbers is 128. The first number is 18 more than the second number. What are the two numbers?