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(3x+5)(2x-7)-7<6x(x+1/2)
(3x+5)(2x-7)-7<6x²+ 3x
6x²-21x+10x-35-7<6x²+ 3x
6x²-21x+10x-6x²- 3x<35+7
-21x+10x- 3x<42
-14x<42
-x<42/14
-x<3
x>-3
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