Answer:
Step 3 is incorrect.
Explanation:
In step 3, the distributive property is used incorrectly. You are supposed to distribute 4 to both the x AND the -1. So the steps would be:
1. 4(x - 1) + 3 = 18
2. 4(x - 1) = 15
3. 4x - 4 = 15
4. 4x = 19
5. x = 19/4
