check markLesson 2-2, Example 5 Check Understanding

Choose the missing justification for the solution of –9 – 4m = 3.

  1. –9 + (–4m) = 3    ?  
    –9 + (–4m) + 9 = 3 + 9    ?  
    –4m = 12    ?  
    -4m/-4 = 12/-4     ?  
    m = –3  Simplify
    1. Definition of subtraction, Addition Property of Equality, Simplify, Division Property of Equality
    2. Definition of subtraction, Subtraction Property of Equality, Simplify, Division Property of Equality
    3. Definition of subtraction, Addition Property of Equality, Simplify, Multiplication Property of Equality
    4. Definition of addition, Subtraction Property of Equality, Simplify, Multiplication Property of Equality

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