Answer:
error is in second step.
Step-by-step explanation:
The given equation is 9x + 18 + 3x = 1
Now we will solve this equation and compare it with the given answer.
9x + 18 + 3x = 1
12x + 18 = 1
12x = (-17)
x = [tex](\frac{-17}{12})[/tex]
Now we find the error is in second step.