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Phổ biến Word Problems >

6 years ago, the age of Jem was thrice the age of Min. The sum of their present ages is 36. Find the age of Jem, 7 years from now

Lời Giải

6 ye a rs a g o, t h e a g e o f J e m w a s t h r i ce t h e a g e o f M in . T h e s u m o f t h e i r p rese n t a g es i s 36. F in d t h e a g e o f J e m, 7 ye a rs f ro m n o w

Lời Giải

Je m^{'} s age in 7 years : 31

Các bước giải pháp

Translate the problem into an equation:

x - 6 = 3 (36 - x - 6)

Giải

x, x - 6 = 3 (36 - x - 6) : x = 24

Tìm Jem's age in 7 years:

31

Je m^{'} s age in 7 years : 31

Ví dụ phổ biến

Kim’s father is now 2 1/2 as old a kim. ten years ago he was 4 times as old as kim I am 24 years old. I am 3 years older than Ana.At present, a man is four times as old as his son. Six years ago, he was thirteen times as old ashis son. How old was the man when his son was born?Tim is now 12 years old. After how many years will his age be greater than twice his present age?A is now 34 years old, and B is 4 years old. In how many years will A be twice as old as B ?