Question

Considere f(x)=2x e g(x)=5x + 6. Determine o valor de x real partindo da equaçao: f(x) + g(8) = f(g(0)).

Answer 1

2x=5x+6
2x-5x=6
-3x=6
x=6/-3
x=-2


("/" significa dividir

Answer 2

f(x) + g(8) = f(g(0))
2x + 5*(8) + 6 = f(5*(0)+ 6)
2x + 40 + 6 = 2*(6)
2x + 46 = 12
2x = 12 - 46
2x = -34
x = -17