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jimmothykhon Group Title

if 10-x = y , then does 20-2x always equal 2y?

  • 9 months ago
  • 9 months ago

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  1. kenm42 Group Title
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    Yes it is. You have multiplied the equation by 2. You can confirm this by drawing a graph of x against y.

    • 8 months ago
  2. fmrbi Group Title
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    if you can divide 20-2x=2y to get 10-x=y, then it confirms that it will always be 2y. The same would apply to 30-3x=3y

    • 3 months ago
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