해법
해법
솔루션 단계
Represent the numbers with :
A.T.Q.:
인기 있는 예
three times the sum of a number and 5 is equal to 68 more than a number x is 13Father's age is 7 times as old as his son. Two years ago; father was 13 times as old as his son. What are their present ages ?A cyclist travels at an 평균 speed of 15 km per hour for 3 hours. How far has the cyclist traveled?Ben is 39 and Kevin is 3. How many years until Ben is 4 times as old as Kevin