Question

помогите..............

Answer 1

$\displaystyle \left \{ {4x-5y=6} \atop {2x+10y=25}} \right. \\\\ \left \{ {{x=\frac{3}{2}+\frac{5}{4}y } \atop {2x+10y=25}} \right. \\\\ 2(\frac{3}{2}+\frac{5}{4}y)+10y=25\\\\ y=\frac{44}{25}=1,76\\ x=\frac{3}{2}+\frac{5}{4}*\frac{44}{25}\\\\ x=\frac{37}{10}=3,7\\ (x,y)=(\frac{44}{25};3,7)$