Question

Способом подстановки решите систему уравнений​

Answer 1

$\left \{ {{0,5x-1=y^{2} } \atop {y+3x-7=0}} \right. \\\left \{ {{0,5x-1=y^{2} } \atop {y=-3x+7}} \right. \\0,5x-1=(-3x+7)^{2}\\x=\frac{20}{9}; x=\frac{5}{2}\\y=-3*\frac{20}{9}+7; y=-3*\frac{5}{2}+7\\y=\frac{1}{3}; y = -\frac{1}{2} \\(x_{1} , y_{1} )=(\frac{20}{9}, \frac{1}{3}); (x_{2}, y_{2} )=(\frac{5}{2}, -\frac{1}{2})$