Answer: Second option is correct.
Step-by-step explanation:
Since we have given that
twice as much as a number is expressed as [tex]2x[/tex]
12 less than a number half of a number is 15 is expressed as
[tex]\dfrac{x}{2}-12=15[/tex]
the difference of 20 and a number is expressed as
[tex]20-x[/tex]
As we know that equation contains an equality.
So, Second option is correct.
