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Answered

12) Mary is 5 years older than Bob. If the sum of their ages is 39, write and solve an equation to find their ages.

Answer :

Bob age =x

Mary age= x+5

If we sum the ages

x+(x+5)=39

2x+5=39

then we clear x

2x=39-5

2x=34

x=34/2

x=17

Bob age =17

Mary age=17+5=22

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