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frac{7+12x}{5}*30-2x*30=frac{13}{2} *30 -frac{-5x}{3}*30\\(7+2x)*6-60x=195-(2-5x)*10\\42+12x-60x=195-20+50x\\-48x-50x=175-42\\-98x=133\\x=-1frac{35}{98}

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