def gaussa(a, b):
    n = len(b)

    for s in range(n - 1):
        for i in range(s + 1, n):
            factor = a[i][s] / a[s][s]
            for j in range(s, n):
                a[i][j] -= factor * a[s][j]
            b[i] -= factor * b[s]

    x = [0] * n
    for i in range(n - 1, -1, -1):
        x[i] = (b[i] - sum(a[i][j] * x[j] for j in range(i + 1, n))) / a[i][i]

    return x


A = [
    [4.88, -2.91, 1.34],
    [1.34, 5.3, -3.31],
    [2.18, -3.49, 6.7]
]

B = [7.86, -2.28, 4.47]

solutions = gaussa(A, B)

print("Macierz A:")
for x in A:
    for a in x:
        print(round(a, 2), end="  ")
    print()
print()

print("Macierz B:")
for b in B:
    print(round(b, 2), end="  ")
print("\n")

print("Wynik: ")
i = 1
for x in solutions:
    print(f"x{i} = {round(x, 2)}")
    i += 1