$-11-5x=30x+24$
Move the variable to the left-hand side and change its sign$-11-5x-30x=24$
Move the constant to the right-hand side and change its sign$-5x-30x=24+11$
Collect like terms$-35x=24+11$
Add the numbers$-35x=35$
Divide both sides of the equation by $35$$-x=1$
Change the signs on both sides of the equation$x=-1$