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인기 있는 Word Problems >

Tom is three times Karin’s age. In ten years, he will be double Karin’s age. How old is Tom now?

해법

T o m i s t h ree t im es K a r in ’ s a g e . I n t e n ye a rs, h e w i ll b e d o u b l e K a r in ’ s a g e . Ho w o l d i s T o m n o w ?

해법

Tom^{'} s age is : 30

솔루션 단계

Translate the problem into an equation:

3 x + 10 = 2 (x + 10)

x

해결 대상

, 3 x + 10 = 2 (x + 10) : x = 10

Tom's age 찾다 :

30

Tom^{'} s age is : 30

인기 있는 예

The diameter of a circle is 26 kilometers. What is the circle's 원둘레?Twice the 차이 of a number and 3 is 9.Six less than the product of 3 and a number is equal to 5.9 plus 6 times a number is 9 times the number Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother?