Question

5years hence the age of jacob will 3 times that of his son 5 years ago jacob age was 7 times that of his son what are their present ages

Answer 1

Answer:

present age of Jacob is 40 and his son is 10

Step-by-step explanation:

let Jacob age = x

his son age= y

now 5 year hence

Jacob age = x+5

his son age ,= y+5

and 5 year ago

Jacob age = x-5

his son age = y-5

now eq. will be

x+5 = 3(y+5)

x+5=3y+15

x-3y=10.............eq1

and

x-5 = 7(y-5)

x-5 = 7y- 35

x-7y= 30............. eg 2

then by solving both eq. you will get x= 40 and y= 10

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