Question

question number 21,22,27,28,29,30
please answer these questions
l will mark you brainlist ​

Answer 1

Answer:

21 .

Step-by-step explanation:

let the age of man = x

let the age of his son = y

now , according to ques

5 years ago

x-5 = 7( y-5 )

x-5 = 7y- 35

x- 7y = -30

now 5 years hence

x+ 5 = 3 ( y+ 5)

x+5 = 3y +15

x - 3y = 10

now equating both equations with elimination method

x - 7y = - 30

x - 3y = 10

- 10 y = -20

y = 2

now put y

x - 3y = 10

x - 6 = 10

x = 16