Question

Se f(x)=3x+2,qual o valor de x para quê f(x)=5 ?(A)0 (B) 1 (C)2 (D)3 (E)4

Answer 1

$3x+2=5\Longrightarrow 3x=3 \Longrightarrow x=\frac{3}{3} =1$