Five years ago,the sum of the ages of four pe | vedclass

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Question

(D) Let the present ages of the four persons be $x_1, x_2, x_3,$ and $x_4$.Five years ago,their ages were $(x_1 - 5), (x_2 - 5), (x_3 - 5),$ and $(x_4

Vedclass · Accepted Answer

$80$

Vedclass · Answer

(D) Let the present ages of the four persons be $x_1, x_2, x_3,$ and $x_4$.Five years ago,their ages were $(x_1 - 5), (x_2 - 5), (x_3 - 5),$ and $(x_4 - 5)$.According to the problem,the sum of their ages five years ago was $60$ years:$(x_1 - 5) + (x_2 - 5) + (x_3 - 5) + (x_4 - 5) = 60$$(x_1 + x_2 + x_3 + x_4) - 20 = 60$$x_1 + x_2 + x_3 + x_4 = 60 + 20$$x_1 + x_2 + x_3 + x_4 = 80$Thus,the sum of their present ages is $80$ years.

Five years ago,the sum of the ages of four persons was $60$ years. The sum of the present ages of those four persons is $\ldots \ldots \ldots \ldots$ years.

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