Math

posted by Will

Given that: 4x – y + 9 = 0 and 3y – 2x = 7, solve for x.
does x=-2?

  1. Steve

    Yes. Could you not check your answer to see whether it fit the equations? That's faster than posting here and waiting for an answer.

  2. Reiny

    from the first: y = 4x+9
    sub into the 2nd:
    3(4x+9) - 2x = 7
    12x + 27 - 2x = 7
    10x = -20
    x = -2

    you had that, but you only found x, you must also find y

    sub x = -2 into y = 4x+9
    y = -8+9 = 1

    x = -2, y = 1

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