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March 29, 2017

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use either substitution or elimination to solve
9x+5y=-6
4x+3y=2

  • math - ,

    9x+5y=-6 ...(1)
    4x+3y=2 ...(2)

    Multiply (1) by 4 and (2) by 9 in order to eliminate x:
    36x+20y=-24 ...(1a)
    36x+27y=18 ...(2a)

    Subtract (1a) from (2a)
    0x+7y=42
    or
    y=6

    Can you take it from here?

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