If 20 is added to one third of a number the result is double the number. what is the number?

Step-by-step explanation:

Let's say the number is called x.

So 1/3 x + 20 = 2x because 2x is the double of x.

Subtract 1/3 x from both sides: 20 = 2x - 1/3 x = 5/3 x

Multiply both sides 3, so we get 3*20 = 5x = 60,

so,

x = 12

The number is 12.

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