Question

One third of a number when added to 20 is 30. Can you find the number

Answer 1

$let \: \: the \: \: number \: \: be \: \: \frac{x}{3} \\ \: \: \: \: \: \: \: \: \: according \: \: to \: \: question \\ = > \frac{x}{3} + \frac{20}{1} \\ \\ = > \frac{x + 60}{3} = 30 \\ \\ = > x + 60 = 30 \times 3 \\ = > x = 90 - 60 \\ = > x = 30 \\ \\ now \: \: \: \: \: \: \: \: \: \frac{30}{3} = 10$

Answer 2

Answer:

Let the required number be equal to x

Therefore,

one-third of the number is- x/3

APQ

20+x/3=30

x/3 = 30-20 = 10

x/3=10

Therefore x= 10 x 3 = 30

Therefore the required number is 30.

Hope you will understand..... Thank You....