n (x) = 4x + 4; n(x) = 16
X =

x = 3Step-by-step explanation:[tex]{ \blue{ \sf{n(x) = 4x + 4}}}[/tex][tex]{ \blue{ \sf{16 = 4x + 4}}}[/tex][tex]{ \blue{ \sf{16 - 4 = 4x}}}[/tex][tex]{ \blue{ \sf{12 = 4x}}}[/tex]Divide both the sides with 4[tex]{ \blue{ \sf{ \frac{12}{4} = \frac{4}{4}x}}}[/tex][tex]{ \green{ \boxed{ \red{ \sf{x = 3}}}}}[/tex]