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شائع Word Problems >

The sum of the ages of John and Mary is 32. Four years ago, John was twice as old as Mary. Find the present age of each.

الحلّ

T h e s u m o f t h e a g es o f J o hn an d M a ry i s 32. F o u r ye a rs a g o, J o hn w a s tw i ce a s o l d a s M a ry . F in d t h e p rese n t a g e o f e a c h .

الحلّ

John^{'} s age is : 20

Mary^{'} s age is : 12

خطوات الحلّ

Translate the problem into an equation:

x - 4 = 2 (32 - x - 4)

x - 4 = 2 (32 - x - 4), x

حلّ لـ:

x = 20

age جد

John^{'} s age is : 20

Mary^{'} s age is : 12

أمثلة شائعة

eight less than the product of 5 and a number is 6.nine more than the product of a number and 8 equals 5 The difference of three times a number and 4 is-19 The product of 6, and a number increased by 7, is 72. What is the number?Consider a deck of cards. If you draw a single card, what is the probability that you draw a red ace