20x=40(x-4)

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Solution for 20x=40(x-4) equation:


Simplifying
20x = 40(x + -4)

Reorder the terms:
20x = 40(-4 + x)
20x = (-4 * 40 + x * 40)
20x = (-160 + 40x)

Solving
20x = -160 + 40x

Solving for variable 'x'.

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

Add '-40x' to each side of the equation.
20x + -40x = -160 + 40x + -40x

Combine like terms: 20x + -40x = -20x
-20x = -160 + 40x + -40x

Combine like terms: 40x + -40x = 0
-20x = -160 + 0
-20x = -160

Divide each side by '-20'.
x = 8

Simplifying
x = 8

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