Question

dada a função f(x)= 5x -7.

F(x) = 18 qual o valor de x?​

Answer 1

Resposta:

f(x)= 5x -7

18 = 5x -7

5x = 25

x = 5

Answer 2

Oie, Tudo Bom?!

$f(x) = 5x - 7$

$18 = 5x - 7$

$- 5x = - 7 - 18$

$- 5x = - 25 \: . \: ( - 1)$

$5x = 25$

$x = \frac{25}{5}$

$\boxed {x = 5}$

Att. Makaveli1996