## anonymous one year ago help, 57 and 58. medal and fan

1. anonymous

2. anonymous

Ok, starting with 57, they give you an equation and they want to know if r=9 is a solution. All you have to do is plug in 9 for r on both sides of the equation and solve. If both sides balance out then it's a solution, if they don't it's not a solution.

3. anonymous

so 2-9/5?

4. anonymous

$\frac{ 2-r }{ 5 }+\frac{ 3r }{ 5 }=\frac{ r+2 }{ 3 }$ $\frac{ 2-9 }{ 5 }+\frac{ 3\times9 }{ 5 }=\frac{ 9+2 }{ 3 }$

5. anonymous

i got 5.6=9.66

6. anonymous

that's not what I got...work on the numerators first...2-9=? and 3x9=?

7. anonymous

-7 and 27

8. anonymous

perfect, so you have -7/5+27/5...what do you get?

9. anonymous

common denominators means you can add the numerators...denominator stays the same.

10. anonymous

20/5=4

11. anonymous

good, now what about the right side of the equation...(r+2)/3?

12. anonymous

11/3

13. anonymous

14. anonymous

thank you

15. anonymous

16. anonymous

it's been awhile since I've done a problem like that. I'm solving it now so I can hopefully help you :)

17. anonymous

thank you !!!!!

18. anonymous

ok, so in theory I have an answer. I'm just going to check quick to be sure!

19. anonymous

okay

20. anonymous

my original work gave me an answer of 4/3, but when I plug it in it doesn't work out right.

21. anonymous

I'm sorry, it's just been too long...I can't remember how to do it correctly. :(

22. anonymous

thats okay. its jst one question! ill jst make a educational guess