Friday

August 1, 2014

August 1, 2014

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

-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.

**Related Questions**

Poetry check? - So I'm doing a project called Equality Matters. I decided to ...

Math - The following are the first four terms of a sequence: a, a (1/b),a(1/b(1/...

brcm - diffrent models of computer What is your question? What is your thinking ...

math,correction - Number problems. You have at least $30 in change in your ...

Math (Algebra) - Solve using the multiplication principle -7x <_ 35 the sign ...

Match please - I have a few match problems that I can't figure out. 1.solve: 3x+...

RiDDLE HELP - K I'm having difficulty on this riddle: A woman goes 4 a walk, and...

check math - Here are my answers. Can you check if I got the right answers? ...

Physics - Consider the LR circuit. We have R1=9 Ohms, R2=5 Ohms, R3=19 Ohms, V=2...

Physics - Consider the LR circuit. We have R1=19 Ohms, R2=23 Ohms, R3=23 Ohms, V...