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saima Group Title

4x-5y=4 and 2x-y=8,using this information,determine the value of x-y.

  • 2 years ago
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  1. joemath314159 Group Title
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    add the two equations and divide by 6.

    • 2 years ago
  2. dinainjune Group Title
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    4x-5y=4.....(1) 2x-y=8......(2) (2)x2 4x-2y=16...(2') (2')-(1) 3y=12 y=4 sub ke (2) 2x-4=8 2x=12 x=6 x=6,y=4

    • 2 years ago
  3. joemath314159 Group Title
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    4x - 5y = 4 +2x - y = 8 ------------ 6x - 6y = 12 Dividing by 6 gives: \[\frac{6x-6y}{6} = \frac{12}{6} \iff x - y = 2\]

    • 2 years ago
  4. saima Group Title
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    thanks

    • 2 years ago
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