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受欢迎的 Word Problems >

Lauren's age is half of Joe's age. Emma is seven years older than Joe. The sum of Lauren, Emma, and Joe's age is 38. How old is Joe?

解答

L a u re n^{'} s a g e i s ha l f o f J o e^{'} s a g e . E mma i s se v e n ye a rs o l d er t han J oe . T h e s u m o f L a u re n, E mma, an d J o e^{'} s a g e i s 38. Ho w o l d i s J oe ?

解答

Joe^{'} s age is : 12 \frac{2}{5}

求解步骤

Translate the problem into an equation:

\frac{1}{2} x + x + 7 + x = 38

求解

x, \frac{1}{2} x + x + 7 + x = 38 : x = \frac{62}{5}

将假分式转换为带分数:

12 \frac{2}{5}

Joe^{'} s age is : 12 \frac{2}{5}

流行的例子

The sum of three consecutive natural numbers is 1146, find the numbers.four times a number increased by 7 is 43 The sum of 3 consecutive odd numbers is357. What is the largest of the numbers?Shawn earned some money doing odd jobs last summer and put it in a savings account that earns 10% interest compounded monthly. After 4 years, there is 1,000.00 in the account. How much did Shawn earn doing odd jobs?20% of what number is 87?