Answer:
Step-by-step explanation:
Simplifying
9x + -2x = 0
Combine like terms: 9x + -2x = 7x
7x = 0
Solving
7x = 0
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Divide each side by '7'.
x = 0
Simplifying
x = 0