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Phổ biến Word Problems >

John is four times as old as Martha. Five years ago, the sum of their ages was 50.

Lời Giải

J o hn i s f o u r t im es a s o l d a s M a r t ha . F i v e ye a rs a g o, t h e s u m o f t h e i r a g es w a s 50.

Lời Giải

Martha^{'} s age is : 12

John^{'} s age is : 48

Các bước giải pháp

Translate the problem into an equation:

4 x - 5 + x - 5 = 50

Giải

x, 4 x - 5 + x - 5 = 50 : x = 12

Tìm age

Martha^{'} s age is : 12

John^{'} s age is : 48

Ví dụ phổ biến

Tim is 5 years older than JoAnn. Six years from now, the sum of their ages will be 79.Jack is twice as old as Lacy. In three years, the sum of their ages will be 54.Monica is 4 years older than Tom. The sum of their ages is 40. How old is Monica?Craig is 4 years older than Bob. A year ago Craig was twice as old as Bob. How old is Bob today?Denise is now 4 over 5 as old as her sister Deth. Four years ago, she was 3 over 4 as old as her sister. What are their present ages?