SOLUTION: solve: 3x/7 - 5x/3 = 2/21 21(3x/7) - 21(5x/3) = 21 (2/21) 9x - 35x = 21 - x = 21 -x/26 = 21/-1 x= =21/26 This answers is not correct; please help.

Algebra ->  Equations -> SOLUTION: solve: 3x/7 - 5x/3 = 2/21 21(3x/7) - 21(5x/3) = 21 (2/21) 9x - 35x = 21 - x = 21 -x/26 = 21/-1 x= =21/26 This answers is not correct; please help.       Log On


   

Question 77177: solve: 3x/7 - 5x/3 = 2/21
21(3x/7) - 21(5x/3) = 21 (2/21)
9x - 35x = 21
- x = 21
-x/26 = 21/-1
x= =21/26
This answers is not correct; please help.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
solve:
3x/7 - 5x/3 = 2/21
;
21(3x/7) - 21(5x/3) = 21(2/21); this is right
:
You should have:
3(3x) - 7(5x) = 2
:
9x - 35x = 2
:
-26x = 2
:
x = 2/-26
:
x = -1/13
:
I check the solution using a calc