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受欢迎的 Word Problems >

Five years ago, Zarah was twice as old as Emman. If Zarah is currently 21 years old now, how old is Emman?

解答

F i v e ye a rs a g o, Z a r ah w a s tw i ce a s o l d a s E mman . I f Z a r ah i s c u rre n tl y 21 ye a rs o l d n o w, h o w o l d i s E mman ?

解答

Emman^{'} s age is : 13

求解步骤

Translate the problem into an equation:

2 (x - 5) = 21 - 5

求解

x, 2 (x - 5) = 21 - 5 : x = 13

Emman^{'} s age is : 13

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