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anonymous

  • 4 years ago

How does 8z-z/2=z/2+15 turn into: 15z/2=15? I understand taking away z/2, but I don't understand where the 15z came from.

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  1. campbell_st
    • 4 years ago
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    well 8 - 1/2 = 7 1/2 or 15/2

  2. anonymous
    • 4 years ago
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    mulitply both sides by 2 you get 16z-z=z+30 combined terms 15z=z+30 -z -z 14z=30 probably easier

  3. anonymous
    • 4 years ago
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    so it wouldnt turn into 15z/2=15 anyway :3

  4. anonymous
    • 4 years ago
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    would be 14z/2=15

  5. campbell_st
    • 4 years ago
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    well its 15z/2 = z/2 + 15 subtract z/2 from both sides 14z/2 = 15 or 7z = 15 z = 15/7

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