9514 1404 393
Answer:
 no solution
Explanation:
Simplifying the given equation, you have ...
 -6(x -2) +3x = -3(x +3) +21 . . . . . given
 -6x +12 +3x = -3x -9 +21 . . . . . . eliminate parentheses
 -3x +12 = -3x +13 . . . . . . . . . . . . collect terms
 0 = 1 . . . . . . . . . . . . . add (3x-12) to both sides
There is no value of x that will make this true. 
The equation has NO SOLUTION.