Question

If
2/3rd
of a number is 20 less than the original number, then the number is

Answer 1

Let the required no. be x.
A/Q
(2/3)x = x - 20
x - (2/3)x = 20
x = 20 × 3 = 60
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Answer 2

let the number be x
$\frac{2}{3} x = x - 20 \\ \frac{1}{3} x = 20 \\ x = 60$