Question

What is the most efficient first step to isolate the variable term on one side of this equation?

Answer 1

D is the correct answer

Answer 2

Answer:
D. add 4x to both sides


Explanation:
-9x = -4x + 5
+ 4x + 4x
-5x = 5

-4x and -4x are opposite terms, so they cancel each other out.
Once you add 4x to both sides, the variable term (-5x) is isolated on one side of the equation.