SOLUTION: I need help with 4x+-9=7x+12

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Question 17043: I need help with
4x+-9=7x+12
Answer by tjnw79(57) About Me  (Show Source):
You can put this solution on YOUR website!
4x+-9=7x+12
=9 to both sides
4x=7x+21
subtract the 7x from both sides
-3x=21
divide -3 by x and 21 to get
x=-7