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-8x – 4y = -68 x + 3y = 16 Solve using the substitution method?

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  • 9 years ago
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    If you know -8x – 4y = 16, then you can solve for y in that one equation.

    -4y=16+8x

    Then divide by -4

    y=-4-2x

    then, take that Y amount (-4-2x) and substitute it into this equation:

    -68 x + 3y = 16

    -68 x + 3(-4-2x) = 16

    -68x -12 -6x = 16

    -74x -12= 16

    -74x = 28

    Then solve for X. When you know X, put it back in the y=-4+2x. You'll get Y.

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