Mathematics - Pre-Algebra - One-step equations - Solving One-Step Equations

6 steps covering all 4 operations: (1) x + 5 = 12. To isolate x, do the OPPOSITE: subtract 5 from both sides. x = 7. (2) x - 3 = 10. Add 3 to both sides. x = 13. (3) 4x = 20. Divide both sides by 4. x = 5. (4) x/3 = 6. Multiply both sides by 3. x = 18. (5) The KEY idea: whatever you do to one side,