9.72 + c + 7.4 + 5.72 + (-7.4) =c+9.72+5.72=15.44+c=1544/100+c=386/25+c = 386/25+65/17=(386*17+65*25)/425=(6562+1625)/425=8187/425 = 19 (whole) 112/425

370

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mstislav

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