Question

After John worked at a job for 10 years, his salary doubled. If he started at $x, his salary after 10 years is

Oslo
2
$x + 2
$x-2
$2x

Answer 1

The answer is $2x
Why? because using process of elimination, you know it can’t be subtraction or addition because it uses the key word doubled, meaning you’d have to multiply leaving you with 2x.

Answer 2

$2x

Explanation:

His salary doubled (x2), so you can eliminate B & C because they are + & -. You can eliminate A because that would represent his current salary. So, that leaves $2x.