Question

dado f(x)=1-5x,sendo f(x)=1/2

Answer 1

f(x) = 1 - 5x 

1/2 = 1 - 5x 

1 = 2.(1 - 5x) 

1 = 2 - 10x 

10x = 2 - 1 

10x = 1 

x = 1/10                           ok