-9+8w=9+10w

To solve this equation, we first need to isolate the variable term (w) on one side of the equation.

Starting with -9 + 8w = 9 + 10w, we can first move all terms with w to one side by subtracting 8w from both sides:

-9 + 8w - 8w = 9 + 10w - 8w
-9 = 9 + 2w

Next, we need to isolate the variable term by subtracting 9 from both sides:

-9 - 9 = 9 - 9 + 2w
-18 = 2w

Now, we can solve for w by dividing both sides by 2:

-18 / 2 = 2w / 2
-9 = w

Therefore, the solution to the equation -9 + 8w = 9 + 10w is w = -9.