Add to each section of the inequality because it does not contain the variable we are trying to solve for.

Add and .

Add and .

Divide each term in the inequality by .

Divide by .

Cancel the common factor.

Divide by .

Divide by .

Rewrite the interval so that the left value is less than the right value. This is the correct way to write an interval solution.

Solve for z -20<-3z-2<10