10th grade algebra

posted by natalie

solve the equation 2x+y=9 for y

  1. bobpursley

    subtract 2x from each side.

  2. natalie

    i don't understand can you be specific please

  3. Joanne

    for 2x+y=9 you do
    -2 -2 (subtract two from both sides)
    then you would get:
    y=9-2x
    (remember that when you move something to the other side you do the opposite equation)(in this case the opposite of positive is negative, so the 2x becomes negative)

  4. Joanne

    sorry subtract 2x from both sides
    my mistake

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