Solution:
f(x) = 2x + 3
g(x) = x - 9
f(x) + g(x)
= (2x + 3) + (x - 9)
= 2x + x + 3 - 9
= 3x - 6
Because when you subtract a negative number the signs cancel out and become and addition problems
-2^6-(6)^2= -100. Hope this helps have a great day. :)
3x=18 because you add the like terms 6 and 12
