=(2e-q)2

Solution for =(2e-q)2 equation:

Simplifying
0 = (2e + -1q) * 2

Reorder the terms for easier multiplication:
0 = 2(2e + -1q)
0 = (2e * 2 + -1q * 2)
0 = (4e + -2q)

Solving
0 = 4e + -2q

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Add '-4e' to each side of the equation.
0 + -4e = 4e + -4e + -2q
Remove the zero:
-4e = 4e + -4e + -2q

Combine like terms: 4e + -4e = 0
-4e = 0 + -2q
-4e = -2q

Divide each side by '-4'.
e = 0.5q

Simplifying
e = 0.5q