Respuesta :

n(x)=7x+4

n(x)= 39

Equal both

n(x)=n(x)

7x+4 =39

Solve for x:

7x+4 =39

Subtract 4 from both sides of the equation:

7x+4-4 =39-4

7x= 35

Divide both sides by 7:

7x/7= 35/7

x=5

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