Question

Two third of a number is 20 less thanthe original number .find the number

Answer 1

let the no . be 'x'
ATQ
x * 2/3 = x - 20
2x/3 = x - 20
2x = 3(x-20)
2x = 3x - 60
- x = -60
x = 60
So the no. is 60

Answer 2

Let the original no be X

→ 2/3 × X =X -20
→ 2x/3 =X - 20
→ 2X =3X -60
→60=2x -3x
X =60

→→ original number is 60