Answer
The right option would be b.
Step-by-step explanation
According to the given data we have the following equation:
10x-3=30
To calculate the value of x in this question, first we would have to move the -3 to the other side.
So, we would have to add 3 to 30.
So, 10x=30+3
Therefore, the right option would be add 3 to 30 using the addition property.