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Solving 2 step variable equations
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Solving 2 step variable equations

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Transcript

  • 1. Solving 2-Step Variable Equations Solving Two-Step Equation
    • Ms. Nixon’s Math Class
  • 2. Remember….
  • 3. What??? I just learned 1-step!
    • Relax. You’ll use what you already know to solve 2-step equations.
  • 4. So, what’s first?
    • You need to break up the equation into two steps .
  • 5. STEP 1
    • The first step will always be either adding or
    • subtracting .
    + -
  • 6. STEP 2
    • The second step will always be either
    • multiplying or dividing .
    • ÷
  • 7. Let’s try a problem.
    • 8x + 5 = 61
    This problem has addition, so we need to subtract first. - 5 - 5 Whatever we do on one side, we have to do on the other. 8x 56 =
  • 8. Now, Step 2.
    • 8x = 56
    This problem has multiplication, so we need to divide now. Whatever we do on one side, we have to do on the other. 8 8 x = 7
  • 9. Let’s try another problem.
    • 3a - 8 = 4
    This problem has subtraction, so we need to add first. + 8 + 8 Whatever we do on one side, we have to do on the other. 3a 12 =
  • 10. Now, Step 2.
    • 3a = 12
    This problem has multiplication, so we need to divide now. Whatever we do on one side, we have to do on the other. 3 3 a = 4
  • 11. Now you try some problems.
    • Copy these problems onto a piece of paper.
    • Break each problem into 2 parts to solve.
    • Show all your work!
    7f + 5 = 40 5q – 7 = 13 12t – 6 = 90 4y + 8 = -12
  • 12. More Practice Problems
    • Follow your steps for solving an equation.
    • Write your steps neatly.
    • The object is to get the variable by itself.
    • Combine like terms first.
    • Check to make sure your answer makes sense.
  • 13. Problem 1
    • -12 = -3 x + 6
  • 14. Answer
    • 6 = x
  • 15. Problem 2
    • 4(-x + 5) = 68
  • 16. Answer
    • X = -12
  • 17. Work Cited
    • This PowerPoint was created by:
    • Tammie Nixon
    • All images are from Microsoft Clipart