Step 1. Multiply by 10 to both sides of the equation to get rid of the decimal point
Step 2. Subtract 120 from both sides of the equation
Step 3. Divide by 30 m to both sides of the equation
Step 4. Check solution with original equation
which is a true statement.
Step 5. ANSWER. The solution is m=-3.2.
I hope the above steps were helpful.
For free Step-By-Step Videos on Introduction to Algebra, please visit http://www.FreedomUniversity.TV/courses/IntroAlgebra or for Trigonometry visit http://www.FreedomUniversity.TV/courses/Trigonometry.