Question

A number is double of another number. if the difference is 20 find the number​

Answer 1

Answer:

$x = 2y$

$x - y = 20$

$2y - y = 20$

$y = 20$

$x = 2y$

$x = 40$

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Answer 2

Answer:

2x-x=20

x=20

Therefore the 1st number is 20 and the 2nd number is 40