To solve the equation 3.84 - (x + 0.89) = 2.3, we need to first distribute the negative sign inside the parentheses:

3.84 - x - 0.89 = 2.3

Next, we combine like terms on the left side of the equation:

3.84 - 0.89 - x = 2.3
2.95 - x = 2.3

Now, we isolate the variable x by subtracting 2.95 from both sides of the equation:

Finally, we multiply both sides by -1 to solve for x:

x = 0.65

Therefore, the solution to the equation is x = 0.65.