Solve

$5(x-6)-7(x+2)=-18$

What is the solution set? Select the correct choice below and, if necessary, fill in the answer box within your cl

A$.$ The solution set is $.$

$($Type an integer or a simplified fraction.$)$

B$.$ The solution set is $\{$all real numbers $\},$ so the equation is an identity.

C$.$ The solution set is $\frac{O}{?},$ so the equation is a contradiction.