B. The equation has one solution.
Step 1. Subtract 2 from both sides
3 + x - 2 = -3x
Step 2. Simplify 3 + x - 2 to x + 1
x + 1 = -3x
Step 3. Subtract x from both sides
1 = -3x - x
Step 4. Simplify -3x - x to -4x
1 = -4x
Step 5. Divide both sides by -4
-1/4 = x
Step 6. Switch sides
x = -1/4
