numpy on my PHONE: 3 equations solved in one lineFREE

Real numpy, running on your phone. The first run offers to install it (one download, then it stays on the phone); np.linalg.solve does the rest.

# numpy: 3 equations, 1 line
#  2x +  y -  z =   8
# -3x -  y + 2z = -11
# -2x +  y + 2z =  -3
import numpy as np

A = np.array([[2, 1, -1],
              [-3, -1, 2],
              [-2, 1, 2]])
b = np.array([8, -11, -3])

print(np.linalg.solve(A, b))
# x = 2, y = 3, z = -1

# a million numbers, averaged:

No app yet? Install it, then open the app and type the code NP1 in Code Library.