Answer:
x = -8
Explanation:
The first choice is the correct one, as is easily verified by putting it in the equation and evaluating:
... 6(-8-1) = 9(-8+2)
... -54 = -54
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You can solve the equation to get the same result.
... 6x -6 = 9x +18
... -24 = 3x . . . . . add -18-6x
... -8 = x . . . . . . . divide by the coefficient of x