Answer:
f= 14/(g +7)
Step-by-step explanation:
3(fg+f) = 2fg-4f+14
3fg +3f = 2fg -4f +14
3fg - 2fg + 3f +4f =14
fg +7f = 14
f( g + 7) = 14
f = [tex]14 / (g +7)[/tex]