# Math Help - Please check my linear equation solution

1. ## Please check my linear equation solution

(3x+3)/(x-3)=7
Foiled the left side to get
3x-9x+3x-9=7
multiplied the right side to get
3x-9x+3x-9=7x-21
solve
-3x-9=7x-21
-3x=7x-12
-10x=-12
x=1.2

2. Originally Posted by dtownangel
(3x+3)/(x-3)=7
Foiled the left side to get
3x-9x+3x-9=7
multiplied the right side to get
3x-9x+3x-9=7x-21
solve
-3x-9=7x-21
-3x=7x-12
-10x=-12
x=1.2

$\frac{3x+3}{x-3} = 7$

$3x+3 = 7(x-3)$

$3x+3 = 7x-21$

$24=4x$

$x=6$

3. so where did i go wrong?

4. ah i just went a more complicated route. probably leading to a mistake

5. Well, the first step looks a little strange...

How did you get $3x-9x+3x-9=7$ from $\frac{(3x+3)}{(x-3)}=7$?

6. Originally Posted by dtownangel
ah i just went a more complicated route. probably leading to a mistake
You can't foil the left side

7. yeah i got some ill-advice from a friend.