There's an error in going from your second to third step: (not +1).
Also, make sure you change the sign when moving a term over to the other side of the equal sign. In your third last step, that should be a +4x^2 (not -).
I know there are other ways to solve this, but if I keep to the rules of Algebra I should be able to solve it this way. Can anyone give me any insight on what I'm doing wrong???
I know the answer is X=7 but 99.99% of true exams require work to prove it.
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