-7
-(-7) is 7 because two negative signs result in a positive. The opposite integer of 7 is -7
Solving
S = 3F - 24
for F gives
S + 24 = 3F
(S + 24)/3 = F
The best choice is the last one:
F = (S + 24)/3
You simplify the expression to -3(x+4), then distribute -3 to x+4. -3•x=-3x and -3•4 is -12 so your final answer is -3x-12
