Our goal is to isolate e. Firstly, we need to distribute 0.75 to (8+e). This gives us 6 + 0.75e = 2 - 1.25e. Next, we can subtract 0.75e from both sides. You can also add 1.25e to both sides, but it really does not matter. This will give us 6 = 2 - -2e. Then, we will subtract 2 from both sides. This gives us 4 = -2e. Finally, we can isolate e by dividing by -2. -2 = e.
The answer is e = -2.