Question

Решите систему уравнений 5x+2y=12,4x-3y=2

Answer 1

Ответ: x=40/23

y=38/23

Объяснение:

$\left \{ {{5x+2y=12} \atop {4x-3y=2}} |- \right. \\ \left \{ {{5x-4x+2y+3y=12-2} \atop {4x-3y=2}} \right. \\\\\left \{ {{x+5y=10} \atop {4x-3y=2}} \right. \\\\\\\left \{ {{x=10-5y} \atop {4(10-5y)-3y=2}} \right. \\\\ \left \{ {{x=10-5y} \atop {40-20y-3y=2}} \right. \\\\\ \left \{ {{x=10-5y} \atop {-23y=-38}} \right. \\\\\ \left \{ {{x=10-\frac{5*38}{23}} \atop {y=\frac{38}{23} }} \right. \\\\\ \left \{ {{x=\frac{40}{23}} \atop {y=\frac{38}{23} }} \right.$