Ithought of number r, added 12 to it, and doubled the result.

2R+24

two times R plus 24

Step-by-step explanation:

Let

R > the number

step 1

added 12 to number R

That means > sum the number R plus the number 12

so

(R+12)

step 2

doubled the result

That means > Multiply the result in step 1 by 2

so

2(R+12)

Distribute the number 2

2R+2(12)

2R+24

The result is two times R plus 24