Question

4х-у=11
6х-2у=13
решить систему

Answer 1

$4x-y=11/*(-2)\6x-2y=13\ \ -8x+2y=-22\6x-2y=13\-2x=-9\x=4.5\18-y=11\y=18-11\y=7 \ \ left { {{y=7} atop {x=4.5}} right.$