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    3. 9x-7=13
    9x-7=13

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    0  Views: 578 Answers: 1 Posted: 12 years ago
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      1 Answer

      9x - 7 = 13


      You have to get 9x by itself. So, do the opposite of subtraction and add 7 on both sides.


      9x - 7 + 7 = 13 + 7


             -7 + 7 will cancel out


      9x = 20


      9x means to multiply. So, do the opposite and divide 9 on both sides.


      9x/9 = 20/9


      Answer:  x = 20/9

      12 years ago. Rating: 2
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