Ответ: x= -1; y= -2

Объяснение:

[tex]\left \{ {{\frac{4x}{7}-\frac{2y}{5}=\frac{8}{35} } \atop {\frac{3x}{2}+\frac{y}{14}=-1\frac{9}{14} }} \right.[/tex]

[tex]\left \{ {{\frac{4x}{7}-\frac{2y}{5}=\frac{8}{35} } \atop x=-\frac{23}{21}-\frac{1}{21}y }} \right.[/tex]

[tex]\frac{4\frac{-23}{21} -\frac{1}{21}y }{7} -\frac{2y}{5} =\frac{8}{35}[/tex]

y=-2

[tex]x=-\frac{23}{21} -\frac{1}{21} *(-2)\\[/tex]

x= -1