Posted by Kris on Sunday, January 24, 2010 at 7:38pm.
Help!
Solve:
1. 3x + 15 = 0
2. 6x + 18 =0
thanks!

math  Ms. Sue, 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  Kris, Sunday, January 24, 2010 at 8:16pm
2. 6x + 18 =0
6x/6 = 18/6
x = 3??

math  Anna, Sunday, January 24, 2010 at 8:19pm
x = 3
You're on the right track, Good job!

math  Ms. Sue, 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  Kris, Sunday, January 24, 2010 at 8:31pm
thank you

math  Ms. Sue, Sunday, January 24, 2010 at 8:34pm
You're welcome.
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