SOLUTION: find f+g, for f(x)=3x-6 and g(x)=4x+1

to check this answer simply make up a value for x
if x=1
f=3(1)-6=3-6=-3
g=4(1)+1=4+1=5
f+g=5+(-3)=2
if (7x-5)=f+g
then(7(1)-5)=7-5=2
2=2
correct