The number of red balloons is four times that of yellow balloons. Red balloons are more than yellow balloons 180. What are the red balloons and yellow balloons respectively?
Solution: If there are x yellow balloons, there are 4x in Red Balloon.
4x-x= 180
3x= 180
x=60
60× 4 = 240 (piece)
A: There are 60 yellow balloons in the red balloon and 240 in the red balloon.