Решите систему линейных уравнений с 2-я переменными 1+2(х-у)=3х-4у 10-4(х+у)=3у-3х
1 + 2X - 2Y = 3X - 4Y 3X - 2X = 1 - 2Y + 4Y X = 2Y + 1 ----------------------- 10 - 4X - 4Y = 3Y - 3X 4X - 3X = 10 - 4Y - 3Y X = - 7Y + 10 ------------------------ 2Y + 1 = - 7Y + 10 2Y + 7Y = 10 - 1 9Y = 9 Y = 1 -------------- X = 2 + 1 = 3
1+2x-2y=3x-4y 10-4x-4y=3y-3x 1+2y=x 10-x=-y 10-1+2y=-y 3y=9 y=3 x=1+6=7 y=3 x=7