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John is 5 years older than Bob who is 10 years older than Jack. The sum of their ages is 57. how old is Bob?

Solution

John is 5 years older than Bob who is 10 years older than Jack. The sum of their ages is 57. how old is Bob?

Solution

Bob^{'} s age is : 20 \frac{2}{3}

Solution steps

Translate the problem into an equation:

x + 5 + x + x - 10 = 57

Solve for

x, x + 5 + x + x - 10 = 57 : x = \frac{62}{3}

Convert improper fractions to mixed numbers:

20 \frac{2}{3}

Bob^{'} s age is : 20 \frac{2}{3}

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