Answer:
-1/3
Step-by-step explanation:
Step 1. Simplify setup.
12/x - 6 = 18/x - 4
Step 2.Subtract 12/x from both sides.
-6 = 6/x - 4
Step 3. Add 4 to both sides.
-2 = 6/x
Step 4. Divide it all by 6 to leave X alone.
-1/3 = x
So X equals to -1/3.
