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-   -   Need help with x-4y=-7 and 7x-5y=20 (https://www.askmehelpdesk.com/showthread.php?t=427403)

  • Dec 22, 2009, 05:23 PM
    melissapetrey
    need help with x-4y=-7 and 7x-5y=20
    The solution to the system of equations by the substiution method.
  • Dec 22, 2009, 07:52 PM
    bones252100

    Add 4y to both sides of the first equation to gain the value of X. Substitute that value of X into the 2nd equation. Solve the final value of Y from the 2nd equation. This value of Y can now be subsituted into the first equation to gain the final value of X. Didn't you listen today?

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