Create linear_equations_in_two_variables.py

maths/linear_equations_in_two_variables.py

@@ -0,0 +1,33 @@
+"""
+Solves linear equations in two variables
+Inputs : Co-efficients of x and y in a pair of equations, Dependents
+Outputs : Values of x and y
+"""
+
+
+def solve(
+    x_coefficient_1: float,
+    y_coefficient_1: float,
+    dependent_1: float,
+    x_coefficient_2: float,
+    y_coefficient_2: float,
+    dependent_2: float,
+) -> list:
+    """
+    >>> solve(4,5,20,1,2,13)
+    [-8.333333333333332, 10.666666666666666]
+    """
+    import numpy
+
+    coefficients = numpy.array(
+        [[x_coefficient_1, y_coefficient_1], [x_coefficient_2, y_coefficient_2]]
+    )
+    dependents = numpy.array([dependent_1, dependent_2])
+    answers = numpy.linalg.solve(coefficients, dependents)
+    return list(answers)
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()