Answer:
x=−3.533333
Explanation:
21 
3 
−1.5x=12.3 
Step 1: Simplify both sides of the equation. 
21 
3 
−1.5x=12.3 
7+−1.5x=12.3 
−1.5x+7=12.3 
Step 2: Subtract 7 from both sides. 
−1.5x+7−7=12.3−7 
−1.5x=5.3 
Step 3: Divide both sides by -1.5. 
−1.5x 
−1.5 
= 
5.3 
−1.5 
x=−3.533333