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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