40x=400-x

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Solution for 40x=400-x equation: 


Simplifying
40x = 400 + -1x

Solving
40x = 400 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
40x + x = 400 + -1x + x

Combine like terms: 40x + x = 41x
41x = 400 + -1x + x

Combine like terms: -1x + x = 0
41x = 400 + 0
41x = 400

Divide each side by '41'.
x = 9.756097561

Simplifying
x = 9.756097561

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