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Solving Equations using Common Denominators
 

Solving Equations using Common Denominators

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    Solving Equations using Common Denominators Solving Equations using Common Denominators Presentation Transcript

    • Solving Equations Multiplying by a Common Denominator
    • Goal/Rule
      • Goal: To find the value of the variable
      • Rule: Use inverse operations to isolate the variable
    • Why?
      • Multiplying by a common denominator eliminates the fractions!
    • Situation 1 =>
    • Situation 1
      • What is the only denominator?
    • Situation 1
      • Multiply both sides by 5.
    • Situation 1 / /
    • Situation 2
      • What is the common denominator?
    • Situation 2
      • Multiply every term in the problem by 4.
    • Situation 2 / / / / 2
    • Example 1
    • Example 1 / / S=21
    • Example 2
    • Example 2 / / / / 2 3
    • Review Situation 1
      • Multiple all terms by the denominator
      • Keep numerator as is
    • Review Situation 2
      • Multiply all terms by the common denominator
      • Eliminate all fractions