math

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Here are a few problems I need solving Make sure to show a check for the solution and write the solution in set notation like {x|x>5}:


Solve for y
-7y-14>42

Solve for x
-2(4x+5) < 2x-20

  • math -

    I do not know set notation. When multiplying/dividing both sides of an inequality by a negative, reverse the carat.

    -7y > 56

    y < -8

    -8x + 10 < 2x - 20

    -10x < -30

    x > 3

  • math (Ooops!) -

    I goofed with a sign. It should be:

    -8x - 10 < 2x - 20

    -10x < -10

    x > 1

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