Question

chapter _
linear equation in one variable.


Ten years ago a father was 7 times as old as his son, and 15 years hence the father will be twice as old as his son. Find their present ages.

solve it one variable

Answer 1

let age of father be x years
and age of son be y years
according to question
(x-10)=7(y-10). eq.1
(x+15)=2(y+15). eq.2
the rest of the solution is in the image

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