Answer:
 or
 or 
Step-by-step explanation:
We use casework on when  and when
 and when  .
.
For the first case,  , we add 9 to both sides to get
, we add 9 to both sides to get
 .
.
Dividing both sides by 3 gives 

For the second case,  , we add 9 to both sides to get
, we add 9 to both sides to get
 .
.
Dividing both sides by 3 gives
 .
.
Checking both cases, we plug in  and
 and  .
. 
For the first case, we have  ,  which satisfies the equation.
,  which satisfies the equation.
For the second case, we have  , which also satisfies the equation.
, which also satisfies the equation. 
This gives us two solutions to the equation;  and
 and  .
.