## julie001 Group Title X+5 over 3 = x-3 over 4 2 years ago 2 years ago

1. gaara438125

i posted this in the other than, does it look like this? $\frac{ x + 5 }{ 3 } = \frac{ x - 3 }{ 4 }$

2. dylan18

what can we do with that?

3. julie001

Yes

4. gaara438125

find x?

5. julie001

Common denominator rite?

6. dylan18

ahhhhhhh!!

7. gaara438125

hahahahaha julie u are truely smart :]

8. gaara438125

so the lcd is obviously 12 which gets us?

9. julie001

Im lost

10. gaara438125

ok so the Least common denominator of 3 and 4 is 12 so you have to multiply $\frac{ x + 5 }{ 3 } * \frac{ 4 }{ 4 }$

11. julie001

20x over 12?

12. dylan18

yah. that rite.

13. gaara438125

no $\frac{ 4x + 20}{12}$ but i see where you could have done the 20x

14. julie001

Ooo wats nxt?

15. dylan18

i mean the solution @gaara438125

16. gaara438125

so the other side then becomes$\frac{ 3x - 9 }{ 12 }$ because we do $\frac{ x - 3 }{ 4 } * \frac{ 3 }{ 3 }$ so it looks like $\frac{ 4x + 20 }{ 12 } = \frac{ 3x - 9 }{ 12 }$

17. gaara438125

multiply both sides by 12 to get what?

18. julie001

Idk hw to do that

19. gaara438125

since both sides are being divided by 12 you can multiply BOTH sides to rid of the fraction leaving only $4x + 20 = 3x - 9$

20. julie001

Do i combine like terms

21. gaara438125

yes :] you are very smart i think your just not trying ;P

22. julie001

I got it thanks ;)

23. gaara438125

ok good