Помогите решить (-0,5x^2y^3z^5)

Вариант 1. {x+2y+3z = 14 {2x+y-z = 1 {3x+2y+2z = 13 Вариант 2 {2x-3y+z = 8 {5x-y-z = 10 {x+3y+4z = 3 Вариант 3 {2x-3y+z = 0 {5x+y-2z = -1 {x-y+z = 3 Вариант 4 {2x+3y+z = 6 {3x-y-z = 1 {5x+2y+4z = 11 Вариант 5 {3x-y+2z = 13 {2x+y-z = 0 {5x+3x+7y =28 Вариант 6 {3x-y + 2z = 10 {7x + z = 22 {-x +3y +2z = 2 Вариант 7 {x +3y -z = 3 {2x -y +4z = 5 {3x + 2y + 5z = 10 Вариант 8 {2x - y +4z = 7 {7x +3y- z = 3 {5x -2y -3z = 4 Вариант 9 {2x +3y- 4z = 1 {3x - y +2z = 12 {4x +3y -3z = 9