en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular >

the ages of john and mary are 54. four years ago, john was twice as old as mary. find the present age of each

Solution

the ages of john and mary are 54. four years ago, john was twice as old as mary. find the present age of each

Solution

Mary^{'} s age is : 29

John^{'} s age is : 54

Solution steps

Translate the problem into an equation:

2 (x - 4) = 54 - 4

Solve for

x, 2 (x - 4) = 54 - 4 : x = 29

Find age

Mary^{'} s age is : 29

John^{'} s age is : 54

Popular Examples

An item is regularly priced at 15. It is now priced at a discount of 20%off the regular price. What is the price now?Charlie invests 6,284 in a retirement account with a fixed annual interest rate of 3% compounded 4 times per year. What will the account balance be after 18 years?Donald took out a loan from a bank at 13% interest compounded quarterly. After 2 years, the balance on the loan was 6,000.00. How much interest had accumulated on the loan?Audrey just measured her pet snake and found out that it is 99 inches long, which is 50% longer than the last time Audrey measured. How long was the pet snake last time?Sehlolo has a son, Louis. Here are some facts about how old Sehlolo and Louis are:Sehlolo is 5 times as old as Louis right now.10 years from now, Sehlolo will be 3 times as old as Louis.How old are Sehlolo and Louis now?