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 .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Cancel the common factor.

Divide by .

Factor out of .

Cancel the common factors.

Factor out of .

Cancel the common factor.

Rewrite the expression.

Solve for x 3<=4x-3<19