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Phổ biến 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?

Lời Giải

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 ?

Lời Giải

Pearl^{'} s age is : 2

Các bước giải pháp

Translate the problem into an equation:

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

Giải

x, x + 13 = 2 (19 - x + 13) : x = 17

Tìm Pearl's age

: 2

Pearl^{'} s age is : 2

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