# Import:

import sympy as sym

# Defining symbols:

x, a, b = sym.symbols('x, a, b')

# Defining a symbolic expression, E1:

E1 = a*x + b

# Solving the equation E1 = 0 for x:

E2 = sym.solve(E1, x)

L = a*x
H = -b
E3 = sym.Eq(L, H)

E4 = sym.solve(sym.Eq(L, H), x)

# Displaying the symbolic solution of E1 = 0:

print('E2:', E2)

print('E4:', E4)