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Popular Word Problems >

Five years ago, Alice was twice as old as Bob. If Alice is now 30 years old, how old is Bob?

Solution

F i v e ye a rs a g o, A l i ce w a s tw i ce a s o l d a s B o b . I f A l i ce i s n o w 30 ye a rs o l d, h o w o l d i s B o b ?

Solution

Bob^{'} s age is : 17 \frac{1}{2}

Solution steps

Translate the problem into an equation:

2 (x - 5) = 30 - 5

Solve for

x, 2 (x - 5) = 30 - 5 : x = \frac{35}{2}

Convert improper fractions to mixed numbers:

17 \frac{1}{2}

Bob^{'} s age is : 17 \frac{1}{2}

Popular Examples

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