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-   -   X-4y=11 (https://www.askmehelpdesk.com/showthread.php?t=553361)

  • Feb 10, 2011, 04:55 PM
    ciera16
    x-4y=11
    How do you work out :
    x-4y=11
    5x-7y=-10
  • Feb 10, 2011, 10:34 PM
    Unknown008

    The shortest way would be a substitution.

    1. Make x the subject of formula in the first equation.
    2. Substitute this into the second formula.
    3. Solve for y.
    4. Use y to get x.

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