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Phổ biến Word Problems >

mark is four years younger than robert. Twenty years ago, mark was thirteen years more than half the age of Robert. How old are they now

Lời Giải

ma r k i s f o u r ye a rs yo u n g er t han ro b er t . Tw e n t y ye a rs a g o, ma r k w a s t hi r t ee n ye a rs m ore t han ha l f t h e a g e o f R o b er t . Ho w o l d a re t h ey n o w

Lời Giải

Mark^{'} s age is : 50

Robert^{'} s age is : 54

Các bước giải pháp

Translate the problem into an equation:

x - 20 = 13 + \frac{1}{2} (x + 4 - 20)

Giải

x, x - 20 = 13 + \frac{1}{2} (x + 4 - 20) : x = 50

Tìm age

Mark^{'} s age is : 50

Robert^{'} s age is : 54

Ví dụ phổ biến

Steve is three times as old as John. In 8 years, John's age will be one half that of Steve's. What are their present ages?Three consecutive even integers add up to 54. Which integers are they?In 36 years, Brendan will be five times as old as he is today. How old will Brendan be in seven years?The sum of two numbers is 52 . The larger number is 14 more than the smaller number. What are the numbers?a bus drove 5 hours and traveled 255 miles what is the rate of the bus in miles or hour