Question

Considere f: R > R dada por f (x) =2x +5. O número real X para f (x) =17 é:

Answer 1

$f(x)~=~17\\\\\\2x~+~5~=~17\\\\\\2x~=~17-5\\\\\\2x~=~12\\\\\\x~=~\frac{12}{2}\\\\\\\boxed{x~=~6}$