Question

решите систему уравнений 1) 6x+11y=107
5x-2y=11

2) 5x-6y=9
15x-18y=26

Answer 1

$1.\\ left {begin{array}{lcl} {{6x+11y=107};;| times5 \ {5x-2y=11};;;;;,|times 6}end{array} right. \\\-left {begin{array}{lcl} {{30x+55y=535} \ {30x-12y=66}}end{array} right. \\\left {begin{array}{lcl} {{67y=469} \ {5x-2y=11}}end{array} right. \\\left {begin{array}{lcl} {{y=7} \ {x=5}}end{array} right.$

Ответ: (5,7)

$2.\\left {begin{array}{lcl} {{5x-6y=9};;|times3 \ {15x-18y=26}}end{array} right. \ \ \ -left {begin{array}{lcl} {{15x-18y=27} \ {15x-18y=26}}end{array} right.\ \ \ left {begin{array}{lcl} {{0=1} \ {15x-18y=26}}end{array} right.$

Решений нет