$12x-36=11-\left( x-5 \right)$
When there is a $-$ in front of an expression in parentheses, change the sign of each term of the expression and remove the parentheses$12x-36=11-x+5$
Add the numbers$12x-36=16-x$
Move the variable to the left-hand side and change its sign$12x-36+x=16$
Move the constant to the right-hand side and change its sign$12x+x=16+36$
Collect like terms$13x=16+36$
Add the numbers$13x=52$
Divide both sides of the equation by $13$$x=4$