Solving One-Step Equations
- 2. Solving One-Step Equations • Goal Your final answer should be variable = number x=7
- 3. The Golden Rule of Algebra • Whatsoever you do to one side of an equation, you must ALWAYS do to the other. (Draw a line through the equal sign to divide the equation into two sides.) Keep it balanced. For example: x + 3 = 5 -3 -3 x+0= 2 Goal x= 2
- 4. Undoing Operations • To reach your goal, you must isolate the variable on one side by undoing the operation. To zero out a number (or undo it), you simply do the opposite operation. To undo addition, you subtract. To undo subtraction, you add. To undo multiplication, you divide. To undo division, you multiply.
- 5. Solving One-Step Equations Problem: Undo addition with subtraction.
- 6. Solving One-Step Equations Solution
- 7. Solving One-Step Equations • Undo subtraction with addition. x – 4 = -2 Don’t forget +4 +4 your integer rules! x+0= 2 x= 2
- 8. Solving One-Step Equations • Undo multiplication with division. The 3’s 3x = 9 cancel 3 3 1x = 3 x= 3
- 9. Solving One-Step Equations • Undo division with multiplication. x = 2 5 The 5’s 5∙x = 2∙5 cancel 5 x = 10
- 10. Solving One-Step Equations Remember, keep it balanced … Now, have fun solving One-Step Equations!