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פּוֹפּוּלָרִי Word Problems >

13 years from now David will be twice as old as Pearl. The current sum of the ages of David and Pearl is 19. How old is Pearl right now?

פתרון

13 ye a rs f ro m n o w D a v i d w i ll b e tw i ce a s o l d a s P e a r l . T h e c u rre n t s u m o f t h e a g es o f D a v i d an d P e a r l i s 19. Ho w o l d i s P e a r l r i g h t n o w ?

פתרון

Pearl^{'} s age is : 2

צעדי פתרון

Translate the problem into an equation:

x + 13 = 2 (19 - x + 13)

x + 13 = 2 (19 - x + 13), x

פתור בשביל:

x = 17

Pearl's age מצא את:

2

Pearl^{'} s age is : 2

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