解答
解答
求解步骤
Translate the problem into an equation:
流行的例子
the 差集 of two numbers is 18 and their sum is 90 find the two numbersthree 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 平均值 speed of 15 km per hour for 3 hours. How far has the cyclist traveled?