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overtonka

  • 3 years ago

solve each system of equations by substitution x-y=1 x+y=-1

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  1. Grazes
    • 3 years ago
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    1. Set one equation to y 2. Substitute the y in the other equation. 3. Solve

  2. Grazes
    • 3 years ago
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    x-y=1 ---> y=x-1 x+ (x-1) =-1 2x-1=-1 2x=0 x=0

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