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Popolare Word Problems >

Ten years ago, Sarah was thrice as old as Mark. If Sarah is currently 40 years old, how old is MArk?

Soluzione

T e n ye a rs a g o, S a r ah w a s t h r i ce a s o l d a s M a r k . I f S a r ah i s c u rre n tl y 40 ye a rs o l d, h o w o l d i s M A r k ?

Soluzione

Mark^{'} s age is : 20

Fasi della soluzione

Translate the problem into an equation:

3 (x - 10) = 40 - 10

Risolvi per

x, 3 (x - 10) = 40 - 10 : x = 20

Mark^{'} s age is : 20

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