Perform the indicated multiplication first: -15 + 5q + 4 = 5q - 11
Note that 5q appears on both sides of this equation. Cancelling, we get :
-11 = -11. This is always true. Thus, -5(3-q) +4=5q-11 is true for all q.
Answer:
An atom of sodium has 11 proton, 11 electrons, and 12 neutrons.
It's 77.472 , but since you probably need too round it will be 77.5
