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2014-08-28T12:34:36-03:00
9x-36=2x+6 ->9x-2x=6+36 -> 7x=42 -> x=42/7 -> x=6

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2014-08-28T12:34:36-03:00
9x-36=2x+6
9x-2x=36+6
7x=42
x=42/7
x=6
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