686=109-4x

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Solution for 686=109-4x equation:


Simplifying
686 = 109 + -4x

Solving
686 = 109 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
686 + 4x = 109 + -4x + 4x

Combine like terms: -4x + 4x = 0
686 + 4x = 109 + 0
686 + 4x = 109

Add '-686' to each side of the equation.
686 + -686 + 4x = 109 + -686

Combine like terms: 686 + -686 = 0
0 + 4x = 109 + -686
4x = 109 + -686

Combine like terms: 109 + -686 = -577
4x = -577

Divide each side by '4'.
x = -144.25

Simplifying
x = -144.25

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