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Algebra

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Can someone help me solve this system by substitution?

y=x-5
y=2x

  • Algebra - ,

    y=x-5
    y=2x
    =========
    from equation 1, y=x-5
    plug this into equation 2 for y.
    x-5=2x
    x-2x=5
    -x=5
    x=-5

    Now substitute x = -5 into equation 1 and solve for y. I have -10 but check my work.

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