Math

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

asked by Will
  1. 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.

    posted by Steve
  2. 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

    posted by Reiny

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