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fkey3191

  • 3 years ago

solve by sustitution method: a=4b a-b=9

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  1. bahrom7893
    • 3 years ago
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    4b-b=9 3b=9 b=3

  2. bahrom7893
    • 3 years ago
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    a = 4*b = 4*3 = 12

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