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x ( x + 3 ) = 0 ( x - 2 ) ( 5 - x ) = 0 ( x - 1 ) ( x^2 + 1 ) = 0 -12 ( x - 5 ) + 7 ( 3 - x ) = 5 30 ( x + 2 ) - 6 ( x - 5 ) - 24 x = 100 | 2 x - 5 | = 13 | 7 x + 3 | = 66 | 5 x - 2 | <_ 0
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