Question

26 баллов, решить систему уравнений.​

Answer 1

$\left \{ {{3(2x+y)-26=3x-2y} \atop {15-(x-3y)=2x+5}} \right.\\\\\left \{ {{6x+3y-26=3x-2y} \atop {15-x+3y=2x+5}} \right.\\\\+\left \{ {{3x+5y=26} \atop {-3x+3y=-10}} \right.\\--------\\8y=16\\\\y=2\\\\3x=26-5y=26-5*2=16\\\\x=5\frac{1}{3}\\\\Otvet:\boxed{(5\frac{1}{3};2)}$