(6 + (-7) / 2 , 7 + (-6) / 2) = ( -1/2 , 1/2)
No santiago is incorrect, the midpoint G is at (-1/2 , 1/2)
15x - 2 + 5x + 3 = 5
20x + 1 = 5
20 x = 4
x = 2
No, Q is not the midpoint, because it is not halfway between P and R
