Solving 2 step variable equations

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Solving 2 step variable equations

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

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