How to solve a system of equations in python

A system of linear equations can be solved with the help of NumPy and arrays. NumPy is a python package used for scientific computations in python. NumPy's core datatype is an array. NumPy functions operate on arrays. ### How to create an array in python NumPy array is created with `np.array()` function. The arguments provided for `np.array()` must be list. For example [10,20,30] [In] ``` import numpy as np np.array([10,20,30]) ``` [out] ``` array([10,20.30]) ``` ### Solving linear equations in python Linear equations can be solved by NumPy and array. Consider the following equation ``` 3x + 2y - z = 18 5x + 4y + z = 36 6x + y - 2z = 21 ``` NumPy's `np.linalg.solve()` function can be applied to solve these linear equations. Below are the steps for solving linear equations in python. * Create NumPy array A as a 3X3 array of the coefficients on the left-hand side of equation * Create a NumPy array B on the right-hand side of the equation * Solve for the values of x, y and z using `np.linalg.solve(A, B)`. Now the array has three entries, one entry for each variable. In [1] ``` import numpy as np A = np.array([[3, 2, -1], [5, 4, 1], [6, 1, -2]]) B = np.array([18, 36, 21]) x = np.linalg.solve(A, B) x ``` Out [1] `array([3,5,1])` References [1] https://www.statology.org/solve-system-of-equations-in-python/ [2] https://www.geeksforgeeks.org/python-solve-the-linear-equation-of-multiple-variable/ [3] https://dwightreid.com/site/how-to-solve-simultaneous-equations-with-python/