It is 780.99999 sorry if i'm incorrect
The first choice is substitution because G s being substituted by C
It would be A, most definitely.
2*(x-5) = -33, so x-5 = -16.5, so x = -11.5
This is assuming that "the difference between a and b" is a-b, which seems to be the accepted interpretation.
6.6 is the answer to that
