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Phổ biến Word Problems >

Alex is a quarter the age of Jenny. In 4 years time, Jenny will be 3 times the age of Alex.How old is Jenny now?

Lời Giải

A l e x i s a q u a r t er t h e a g e o f J e nn y . I n 4 ye a rs t im e, J e nn y w i ll b e 3 t im es t h e a g e o f A l e x . Ho w o l d i s J e nn y n o w ?

Lời Giải

Jenny^{'} s age is : 32

Các bước giải pháp

Translate the problem into an equation:

x + 4 = 3 (\frac{1}{4} x + 4)

Giải

x, x + 4 = 3 (\frac{1}{4} x + 4) : x = 32

Jenny^{'} s age is : 32

Ví dụ phổ biến

six less than the product of 9 and a number is equal to 7 Two hikers, Alan and Ben, are 21 miles apart and walking towards each other. They meet in 6 hours. Find the rate of each hiker if Ben walks 0.3 mph faster than Alan.If 800 is invested at an interest rate of 3.75% per year, compounded quarterly, find the value of the investment after 2 years negative three times a number plus four is no more than the number minus eight Margaret invested 2000 at an annual interest rate of 4%, compounded continuously. If she does not make any withdrawals or deposits, approximately how much money will she have after 5 years?