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Mathematics 21 Online
OpenStudy (anonymous):

5 = -9x + 23

OpenStudy (inkyvoyd):

Ok, you've asked a few of these now. I think I"m going to teach you how to solve them, instead of just telling you what to do...

OpenStudy (inkyvoyd):

When you see an equality like this, you always want to do one thing. You must isolate the variable.

OpenStudy (inkyvoyd):

Give x and what's before it (in this case, -9x) its own side.

OpenStudy (inkyvoyd):

Do you know how to do that?

OpenStudy (anonymous):

yes

OpenStudy (inkyvoyd):

Can you show me your work then?

OpenStudy (anonymous):

9x+23=5

OpenStudy (inkyvoyd):

Hm. What we're trying to do is move everything next to -9x to the other side..

OpenStudy (inkyvoyd):

You'll want to do this 5 = -9x + 23 5-23=-9x + 23 - 23 5-23=-9x

OpenStudy (anonymous):

x=2

OpenStudy (inkyvoyd):

Yes. Good job. Do you understand?

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