解答
解答
求解步骤
Translate the problem into an equation:
求解
流行的例子
Two fair dice are thrown together. What is the probability of rolling a total of 7?Fred is 4 years older than Barney. 5 years ago the sum of their age was 50. How old are they nowBen is 4 times older than Kevin and is also 6 years older as than KevinFive subtracted from 3 times a number is 4suppose the diameter of a circle is 6 units. what is its 周长