2y-4x=b

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Solution for 2y-4x=b equation: 


Simplifying
2y + -4x = b

Reorder the terms:
-4x + 2y = b

Solving
-4x + 2y = b

Solving for variable 'x'.

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

Add '-2y' to each side of the equation.
-4x + 2y + -2y = b + -2y

Combine like terms: 2y + -2y = 0
-4x + 0 = b + -2y
-4x = b + -2y

Divide each side by '-4'.
x = -0.25b + 0.5y

Simplifying
x = -0.25b + 0.5y

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