Question

5. After x years, sum of age of father, mother and their daughter will be y years. Then sum of their ages before z years was ___ years. ​

Answer 1

Hey there! Here is ur answer:

Let the age of father be, a

Let the age of mother be , b

Let the age of daughter be, c

Then after x years,

x+a+x+b+x+c=y

3x+a+b+c=y

Then before z years ,

a-z+b-z+c-z

sum of their ages before z years was , -3z+a+b+c

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