The correct option is B 2
Given, the sum of three times a number and 12 is equal to 18.
Let the number be x.
⟹ 3 times x = 3x
Given, the sum of 3x and 12 is equal to 18.
⟹ 3x+12=18
Transposing 12 to the other side, we get
3x=18−12
⟹ 3x=6
⟹ x=2
Hence, the required number is 2.