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anonymous

  • one year ago

Solve the system of equations. x + 3y = −1 2x + 2y = 6

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  1. anonymous
    • one year ago
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    You can solve it by elimination

  2. anonymous
    • one year ago
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    double the top equation so 2x+6y=-2 now subtract the second equation from that to only have y in the equation and solve for y, then apply the y value to any of the first 2 equations to solve for x.

  3. anonymous
    • one year ago
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    You can divide the second equation by -2 x cancels and you have y= -4 plug in y to find x

  4. anonymous
    • one year ago
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    and you have solved through elimination

  5. anonymous
    • one year ago
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    Thats new, I don't think I have actually ever used division for elimination in simultaneous equations *-*

  6. zzr0ck3r
    • one year ago
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    division is just multiplying by a reciprocal.

  7. anonymous
    • one year ago
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    When I noticed that I become a lot faster in arithmetic, breaking down numbers into its factors for easier mental maths

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