40-(40-x)+40-x+x=40

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Solution for 40-(40-x)+40-x+x=40 equation: 


Simplifying
40 + -1(40 + -1x) + 40 + -1x + x = 40
40 + (40 * -1 + -1x * -1) + 40 + -1x + x = 40
40 + (-40 + 1x) + 40 + -1x + x = 40

Reorder the terms:
40 + -40 + 40 + 1x + -1x + x = 40

Combine like terms: 40 + -40 = 0
0 + 40 + 1x + -1x + x = 40
40 + 1x + -1x + x = 40

Combine like terms: 1x + -1x = 0
40 + 0 + x = 40
40 + x = 40

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

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

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

Solving
x = 0

Solving for variable 'x'.

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

Simplifying
x = 0

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