Sara is decorating her new game room. She wants to paint the room purple, but she has only red and blue paint. She knows that by combining red and blue she will get purple. In order to make the shade of purple she wanted, she combines three liters of red paint with four liters of blue paint. She realized that she would need a total of 56 liters of purple paint to cover the whole room. She began to make a table to help him think about the problem, but is unsure of what to do next.
