import math
a = [7.0,1.0,9.0]
b = [0.0,1.0,0.0]
c = [1.0,9.0,6.0]
svk = [0.0,9.0,8.0]


x1=x2=x3=k = 0
x01=x02=x03 =1

'''
Цикл, в условии ставим наше усовие останова, x11,x22,x33 - наши итерации
'''

while (x01>0.01) or (x02>0.01) or (x03>0.01):
    x11 = 1/a[0]*(svk[0]-a[1]*x2-a[2]*x3)
    x22 = 1/b[1]*(svk[1]-b[0]*x1-b[2]*x3)
    x33 = 1/c[2]*(svk[2]-c[0]*x1-c[1]*x2)

    x01 = math.fabs(x11-x1)
    x02 = math.fabs(x22-x2)
    x03 = math.fabs(x33-x3)


    x1 = x11
    x2 = x22
    x3 = x33
    k +=1


print('Х1= ',round(x1,4))
print('X2= ',round(x2,4))
print('X3= ',round(x3,4))
print('Количество итераций',k)