Question

Sendo F(X)= - 2x + 4
calcule:X, quando F(x) = - 2

Answer 1

F(x)= -2x+4  
-2=-2x+4  
2x= 4+2  
2x=6  
x=6/2  
 x=3

Answer 2

Me ajudem

Resolva

A) f (x)=2x-4

B) f (x)=6x+18

C) f (x)=13x+9

D) f (x)=27x-35