Answer:
The answer to this question is x = -1.
Step-by-step explanation:
To answer this question, you would need to isolate the variable by dividing each side by factors that don't contain said variable.
In this question, to start off, you would need to add the similar elements.
1+8x=-16-9x
Then subtract 1 from both sides.
1+8x-1=-16-9x-1
Simplify your answer.
8x=-9x-17
Then add 9x to both sides.
8x+9x=-9x-17+9x
Simplify again.
17x=-17
Divide both sides by 17.
\frac{17x}{17}=\frac{-17}{17}
Simplify to get your final answer.
x = -1