Somone please help me. Giving brainliest !!

Answer:
j = 7
Step-by-step explanation:
First expand the right hand side:
3 = 3(j-6)
3 = 3j - 18
Then we can move 18 to the left hand side and calculate for j.
3 = 3j - 18
21 = 3j
j = 7