How do you answer this question?

How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

The length of the largest fish is 967.74 times greater than the length of the smallest fish. select a variable expression that shows the length of the largest fish, if 8 is the length of the smallest fish. a. s + 967.74 b. \[ \frac{967.74}{s} \] c. 967.74 - s d. 967. 74s

For the equations below which statement is true ? -2x=14 6x=-42