Answer :
Knowing that f(x)=6x-4 and f(x)=26 we can substitute fx as 26 and solve equation
26=6x-4 /+4 add 4 both sides
26+4=6x
30=6x /:6 divide both sides by 6
30:6=x
6=x - its our result
26=6x-4 /+4 add 4 both sides
26+4=6x
30=6x /:6 divide both sides by 6
30:6=x
6=x - its our result
