SOLUTION: 2x-(9x-4)

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Question 11833: 2x-(9x-4)
Answer by longjonsilver(2297) About Me  (Show Source):
You can put this solution on YOUR website!
what about it? just expand the bracket?

2x-(9x-4)
--> 2x-9x+4

this is because 2x-(9x-4) means 2x-1*(9x-4) and so (-1)*(+9x)=-9x and (-1)*(-4)=+4

jon.