Question

4x-3y=14 и 2x+5y=-6 способ сложения

Answer 1

$\left \{ {{4x-3y=14} \atop {2x+5y=-6\, |\cdot (-2)}} \right. +\; \left \{ {{4x-3y=14} \atop {-13y=26}} \right. \; \left \{ {{4x+6=14} \atop {y=-2}} \right. \; \left \{ {{x=2} \atop {y=-2}} \right.$

Ответ: (2,-2).

Answer 2

$\left \{ {{4x-3y=14} \atop {2x+5y=-6}/*(-2)} \right. \\ \left \{ {{4x-3y=14} \atop {-4x-10y=12}} \right. \\ -13y=26\\13y=-26\\y=-2\\4x-3*(-2)=14\\4x+6=14\\4x=14-6\\4x=8\\x=2$