Решите систему уравнений {2(3x+2y)+9=4x+21 {2x+10=3-(6x+5y)

{2(3x + 2y) + 9 = 4x + 21,2x + 10 = 3 - (6x + 5y);{6x + 4y + 9 = 4x + 21,2x + 10 = 3 - 6x - 5y;{2x + 4y = 12,8x + 5y = -7;{x + 2y = 6,8x + 5y = -7;{ x = 6 - 2y,8 * (6 - 2y) + 5y = -7;{ x = 6 - 2y,48 - 16y + 5y = -7;{ x = 6 - 2y,-11y = - 55;{ x = 6 - 2y,y = 5;{ x = 6 - 2 * 5,y = 5;{ x = -4,y = 5.Ответ: (-4; 5).