## arw1998 one year ago Is x= -1.75 the answer to this? I have already worked it out. I am just checking it. 4x+2(x+1)=9

1. hartnn

6x +2 = 9 6x = 7 x= 7/6 x= 1.1667 how did u get -1.75 ?

2. Jordan7

3. arw1998

4x+2(x+1)=9 4x+2-2(x+1)=9-2 4x(x+1)=7 4x=7 4x/4=7/4 x=1.75 Sorry I meant to put positive 1.75 not negative. But I still have a feeling that my answer is incorrect.

4. Jordan7

well take 1.75 and plug it in for x and what do you get

5. arw1998

not 9. so im incorrect

6. hartnn

4x+2(x+1)=9 4x+2-2(x+1)=9-2 itself is incorrect. why did u subtract 2 ? and its not done properly

7. arw1998

okay. so what is the first step to do? I have not had math in about a year so I need some refreshing. My teacher gave us practice problems for the first day, so she didn't teach or go over anything, so I am very lost.

8. hartnn

4x+2(x+1)=9 1st step is to simplify 2(x+1) by distributing |dw:1389463858607:dw|

9. arw1998

so 2x?

10. arw1998

or 3x?

11. hartnn

|dw:1389464033269:dw|

12. hartnn

4x+2(x+1)=9 4x+2x+2=9 now subtract 2 from both sides.

13. arw1998

so it was 2x? And I have to keep the +2?

14. hartnn

4x+2x+2=9 4x+2x = 9-2 can u solve further ? 4x+2x = ???

15. arw1998

x=7/6

16. hartnn

yes, thats correct :)

17. arw1998

Thank you so much! I just didn't remember the distributive property part.

18. hartnn

you're welcome ^_^ keep practicing :)

19. arw1998

I definitely will. :)

20. phi

You check out Khan's videos to refresh your memory for example http://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-variables-expressions/cc-7th-manipulating-expressions/v/combining-like-terms-and-the-distributive-property In general, if you have a question, search his site for a pertinent video.

21. arw1998

Okay, thank you. :)