Your answer to this question is going to be x= -3. You solve this by moving x to one side of the equation and solving. Hope I helped!
In many republics, power is split between the federal government, which oversees the affairs of the nation as a whole (things like the military, foreign policy, etc), and provincial government which are local governments meant to deal with smaller issues like education, housing, etc.
The answer is D. The country will fall apart without it.