Discussion Forum



1)

If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 and taking away 4 from the product, the number is :


A) 2

B) 3

C) 4

D) 6

E) 7

Answer:

Option C

Explanation:

Let the number be $x$.
Then, $2x+20=8x-4$
$\Leftrightarrow 6x = 24$
$\Leftrightarrow x = 4$.