Multi-step equations - FREE Math Worksheets Solve the equation. 12 = 7m - 5 - 2m + 2 We have two sets of like terms in this equation. The 7m and the -2m will combine to be a 5m and the -5 and the +2 will combine to become -3. 12 = 5m - 3 Now, add 3 to both sides. +3 +3 15 = 5m Divide both sides by 5. 5 5 3 = m These multi-step equations can get a bit long and difficult.