Question

please answer question no.8

Answer 1

Let age be x.

x+12 = 3×(x-4)

= 3x -12

x =3x-12-12

x-3x = -12-12

-2x = -24

2x = 24

x = 24/2

=12 years

Answer 2

let the no. be x

ATQ

X/5 + 5 = x/4 - 5

x/5 = x/4 -5 -5

x/5 = x/4 - 10

x/5 - x/4 = -10

-x/20 = -10

-x = -200

x=200