One Step Equations
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One Step Equations

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posted at classroom.jc-schools.net/ce/algebravest.ppt

posted at classroom.jc-schools.net/ce/algebravest.ppt

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  • You must subtract the same number from what you want to be moved. The idea is keep the variable alone by doing the opposite.
  • Add the opposite sign of the number you want to move.
  • When solving multiplication equations, you divide both sides by the number attached to the variable. Be sure to use the same sign.
  • Multiply both sides by the reciprocal. You must keep the sign of the fraction with the variable.

One Step Equations One Step Equations Presentation Transcript

  • One step equations Add Subtract Multiply Divide
  • Addition
    • X + 5 = -9
    • X + 5 - 5 = -9 -5
    • X = -14
    • -6 + X = -4
    • -6 + 6 + X = -4 + 6
    • X = 2
  • Try the following on your paper.
    • 10 = X + 3
    • 5 + X = 9
    • 6 = 3 + X
  • Answers!!!
    • X = 7
    • X = 4
    • X = 3
  • Equations with subtraction
    • X - 5 = 8
    • X - 5 + 5 = 8 +5
    • X = 13
    • 5 - X = 6
    • 5 - 5 + X = 6 - 5
    • X = 1
  • Try the following on your paper.
    • X - 7 = -1
    • X - 4 = 66
    • 8 = X - 2
    • -8 = X - 2
  • Answers!!!
    • X = 6
    • X = 70
    • X = 10
    • X = -6
  • Multiplication of Equations
    • 3X = -9
    • 3X /3 = -9 /3
    • X = -3
    • -5X = -40
    • -5X /-5 = -40 /-5
    • X = 8
  • Try these on your paper.
    • 4X = -16
    • -1X = 9
    • 6 = 5X
    • 12X = 3
  • Answers!!!
    • X = -4
    • X = -9
    • X = 6/5
    • X = 1/4
  • Division of Equations
    • 1/2X = 4
    • (2/1) 1/2X = 4 (2)
    • X = 8
    • -3/4X = 6
    • (-4/3) (-3/4)X = 6 (-4/3)
    • X = -8
  • Try these on your paper.
      • X/3 = 9
      • -X/4 = 7
      • 1/3X = -1
      • 4 = X/4
  • Answers!!!
    • X = 27
    • X = -28
    • X = -3
    • X = 16
  • Write the following on your paper for a quiz grade.
    • _4X = 15
    • X/2 = -8
    • 9 - X = -1
    • -12 + X = 0
    • -X/3 = 4
    • X + 5 = 5
    • X - 4 = 4
    • -X = 5
    • X + 50 =-50
    • X/5 = -55