SOLUTION: 3x+ 2y=-2 multiply this equation by -3 & add them 15x 6y=12 to get -9x-6y=6 ------------------------------ 6x=18 want to know how 6x-18 came about from -9x-6y=6 x=18/6

Algebra ->  Algebra  -> Systems-of-equations -> SOLUTION: 3x+ 2y=-2 multiply this equation by -3 & add them 15x 6y=12 to get -9x-6y=6 ------------------------------ 6x=18 want to know how 6x-18 came about from -9x-6y=6 x=18/6      Log On

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Question 186924: 3x+ 2y=-2 multiply this equation by -3 & add them
15x 6y=12
to get -9x-6y=6
------------------------------
6x=18 want to know how 6x-18 came about from -9x-6y=6
x=18/6
x=3 answer.


can anyone tell me how my book got 6x=18 from -9x-6y=6 ?

Answer by ankor@dixie-net.com(12704) About Me  (Show Source):
You can put this solution on YOUR website!
3x + 2y =-2
15x+ 6y =12
Let's just do it and see
multiply the 1st equation by -3 & add them
-9x - 6y = +6
15x + 6y = 12
---------------adding eliminates y
+6x + 0y = 18
6x = 18
x = 18%2F6
x = 3
;
I don't see what the problem is here