-1 = (x-1)/3
(multiply both sides by 3)
-3 = x-1
(add 1 on both sides)
x=-2
I really don’t understand this question. can you explain this in the comment so i can answer your
Answer:

Step-by-step explanation:
Given: Equation is 
To find: flaw in Gwendolyn's work and the correct solution to the equation.
Solution:
In the given question,
the first step is 
The second step is 
(This step is obtained on multiplying
by
)
The third step is 
This step is wrong as on transposing 12 from left side of the equation in the second step to the right side, the following equation is obtained:

So, the correct solution is 
Answer:
The distributive property
Step-by-step explanation:
The equation 3+7x