[tex]\displaystyle\bf\\\frac{x^{6} y+xy^{6} }{5\cdot(3y-2x)} \cdot\frac{2\cdot(2x-3y)}{x^{5}+y^{5} } =-\frac{xy\cdot(x^{5} +y^{5} )\cdot 2\cdot(3y-2x)}{5\cdot(3y-2x)\cdot(x^{5} +y^{5} )} =\\\\\\=-\frac{2xy}{5} \\\\\\x=\frac{1}{8} \ \ \ ; \ \ \ y=-8\\\\\\-\frac{2xy}{5} =-\frac{2\cdot\dfrac{1}{8}\cdot(-8) }{5} =\frac{2\cdot 1}{5} =\frac{2}{5} =0,4[/tex]
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[tex]\displaystyle\bf\\\frac{x^{6} y+xy^{6} }{5\cdot(3y-2x)} \cdot\frac{2\cdot(2x-3y)}{x^{5}+y^{5} } =-\frac{xy\cdot(x^{5} +y^{5} )\cdot 2\cdot(3y-2x)}{5\cdot(3y-2x)\cdot(x^{5} +y^{5} )} =\\\\\\=-\frac{2xy}{5} \\\\\\x=\frac{1}{8} \ \ \ ; \ \ \ y=-8\\\\\\-\frac{2xy}{5} =-\frac{2\cdot\dfrac{1}{8}\cdot(-8) }{5} =\frac{2\cdot 1}{5} =\frac{2}{5} =0,4[/tex]