![image](https://tex.z-dn.net/?f=+%5Cleft+%5C%7B+%7B%7B3y-x%5E2%3D13-4x%7D+%5Catop+%7By%3D5-x%7D%7D+%5Cright.+%5C%3B++%5Cleft+%5C%7B+%7B%7B3%285-x%29-x%5E2%3D13-4x%7D+%5Catop+%7By%3D5-x%7D%7D+%5Cright.+%5C%3B++%5Cleft+%5C%7B+%7B%7Bx%5E2-x-2%3D0%7D+%5Catop+%7By%3D5-x%7D%7D+%5Cright.+%5C%3B++%5Cleft+%5C%7B+%7B%7Bx_1%3D-1%2Cx_2%3D2%7D+%5Catop+%7By_1%3D6%2Cy_2%3D3%7D%7D+%5Cright.+%5C%5C%5C%5Cx_1%2By_1%3D-1%2B6%3D5%3E0%2C%5C%3B+x_2%2By_2%3D2%3D3%3D5%3E0%5C%5C%5C%5C2x_1%2By_1%3D-2%2B6%3D4%2C%5C%5C%5C%5C2x_2%2By_2%3D4%2B3%3D7%5C%5C%5C%5COtvet%3B%5C%3B+4%2C7.)
0,\; x_2+y_2=2=3=5>0\\\\2x_1+y_1=-2+6=4,\\\\2x_2+y_2=4+3=7\\\\Otvet;\; 4,7." alt=" \left \{ {{3y-x^2=13-4x} \atop {y=5-x}} \right. \; \left \{ {{3(5-x)-x^2=13-4x} \atop {y=5-x}} \right. \; \left \{ {{x^2-x-2=0} \atop {y=5-x}} \right. \; \left \{ {{x_1=-1,x_2=2} \atop {y_1=6,y_2=3}} \right. \\\\x_1+y_1=-1+6=5>0,\; x_2+y_2=2=3=5>0\\\\2x_1+y_1=-2+6=4,\\\\2x_2+y_2=4+3=7\\\\Otvet;\; 4,7." align="absmiddle" class="latex-formula">