SOLUTION: 3-(5x-4)-9x=21 I don't know what to do! I tried to solve this way: -5x-9x=21-3+4 -14x=22 x= -22/14 but this isn't right... please help

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Question 738487: 3-(5x-4)-9x=21
I don't know what to do! I tried to solve this way:
-5x-9x=21-3+4
-14x=22
x= -22/14
but this isn't right...
please help
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!



Multiply both sides by



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Your problem was dealing with
Remember that (-) x (-) = (+), so

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Check the answer:






OK
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