ja

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

人気のある Word Problems >

Nine years ago, Kevin was seven times as old as Jerry. Nine years from now, Kevin will be two and a half times as old as Jerry. How old is Kevin?

解

N in e ye a rs a g o, Ke v in w a s se v e n t im es a s o l d a s J erry . N in e ye a rs f ro m n o w, Ke v in w i ll b e tw o an d a ha l f t im es a s o l d a s J erry . Ho w o l d i s Ke v in ?

解

Kevin^{'} s age is : 51

解答ステップ

Translate the problem into an equation:

x - 9 = 7 (y - 9), x + 9 = \frac{5}{2} (y + 9)

x - 9 = 7 (y - 9), x + 9 = \frac{5}{2} (y + 9) : x = 51, y = 15

Kevin^{'} s age is : 51

人気の例

A sofa is discounted to 375. If this is a 35% discount, find the recommended retail price.If you deposit 4000 into an account paying 6% annual interest compounded quarterly, how much money will be in the account after 5 years?the sum of two numbers is 26. the product of the two numbers is 153. what are the two numbers Juan deposits \$6000 into an account that pays simple interest at a rate of 2% per year. How much interest will he be paid in the first 5 years?The sum of 2 numbers is 46. One number is 12 more than the other number. What are the numbers?