The answer is A, 3.3. You first want to distribute the + symbol to the 5.9, which will make it still a negative. From then you want to combine like terms so you can add -9.8+-5.9. That should be equal to -15.7. Your equation now is looking like -15.7+u=-12.4. You want to leave the u alone so now you have to do the opposite of -15.7 which is add 15.7. What you do to one side, you do to the other. Now add 15.7 to -12.4. That should be 3.3. Now it looks like u=3.3 which is your answer.
