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Posted by on Sunday, January 24, 2010 at 7:38pm.

Help!
Solve:

1. 3x + 15 = 0

2. 6x + 18 =0

thanks!

  • math - , Sunday, January 24, 2010 at 7:43pm

    I'll do the first one.

    3x + 15 = 0
    3x = -15
    x = -5

    I'll be glad to check your work for the second problem.

  • math - , Sunday, January 24, 2010 at 8:16pm

    2. 6x + 18 =0
    6x/6 = 18/6
    x = 3??

  • math - , Sunday, January 24, 2010 at 8:19pm

    x = -3
    You're on the right track, Good job!

  • math - , Sunday, January 24, 2010 at 8:20pm

    Almost right.
    But you forgot to subtract 18 from the right side of the equation.


    6x + 18 =0
    6x/6 = -18/6
    x = -3

    To check it, substitute -3 for x.

    6(-3) + 18 = 0
    -18 + 18 = 0

    That's it!

  • math - , Sunday, January 24, 2010 at 8:31pm

    thank you

  • math - , Sunday, January 24, 2010 at 8:34pm

    You're welcome.

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