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3x - (5x - 9) = 7 - 4(x + 1)
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3x - (5x - 9) = 7 - 4(x + 1)

User Adam Speight
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3x-(5x-9)=7-4(x+1)\\\\3x-5x+9=7-4x-4\\\\-2x+9=-4x+3\ \ \ \ |-9\\\\-2x=-4x-6\ \ \ \ |+4x\\\\2x=-6\ \ \ \ |:2\\\\x=-3

User Witold Kowelski
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