Posted by **Anonymous** on Wednesday, September 22, 2010 at 11:08pm.

Ex 2:

-2x+7=22

-2x+7-7=22-7

-2x=15

-2x/(-2)=15/(-2) I do not have to switch the equality sign. Even if I did it would not look any different.

x=-7.5

Check:

-2x+7=22

-2(-7.5)+7=22 my solution is that x=-7.5 so I will just put that in to see if it works.

15+7=22

22=22

Yes. It does work. I have solved it correctly for sure. And I can write my solution as {x|x=-7.5} but usually with equations we just leave the solution as x=-7.5 because x is just one value and not a whole set. But you can use this set notation here too if you like.

## Answer this Question

## Related Questions

- Math (Algebra) - Solve using the multiplication principle -7x <_ 35 the sign ...
- Poetry check? - So I'm doing a project called Equality Matters. I decided to ...
- Math - Graph the solution: 3x-y-7<0 x+5y+3>=0 This is my thought process ...
- Math - The following are the first four terms of a sequence: a, a (1/b),a(1/b(1/...
- math - if the inequality is: (x+5/x-2)>0 . "x-5 over x-2 greater or equal to ...
- electromagnetism - A series RLC circuit is connected to a a DC battery via a ...
- Math - Can someone please help me with an algebra problem? -|4-8b|=12 I really ...
- math - Can anyone help me with dq i week 2Post your response to the following: ...
- math 116 - How do you know if a value is a solution for an inequality? How is ...
- math 116 - How do you know if a value is a solution for an inequality? How is ...