question\nsolve for x:\n1 - (x + 9) = -(-x - 9)

Explanation:

Step1: Remove parentheses

$1 - x - 9=x + 9$

Step2: Combine like - terms on the left - hand side

$-x - 8=x + 9$

Step3: Add $x$ to both sides

$-8=x + 9+x$

Step4: Combine like - terms on the right - hand side

$-8 = 2x+9$

Step5: Subtract 9 from both sides

$-8-9=2x$ $-17 = 2x$

Step6: Divide both sides by 2

$x=-\frac{17}{2}$

Answer:

$x =-\frac{17}{2}$