Answer:
Mistake was subtracting x rather than adding x in the first step
The true answer is x = - 4
Explanation:
Lets first solve the equation so we can compare to identify where the mistake is.
6 - x = 5x + 30
==> add x to both sides
6 = 6x + 30
==> subtract 30 from both sides
-24 = 6x
==> divide both sides by 6
-4 = x is the correct answer.
After comparing our work with their work, the mistake seems to be made in the first step. They subtracted x from both sides rather than adding x to both sides. This is wrong because the inverse of subtraction is addition.