40=2w+(40-2w)

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Solution for 40=2w+(40-2w) equation: 


Simplifying
40 = 2w + (40 + -2w)

Remove parenthesis around (40 + -2w)
40 = 2w + 40 + -2w

Reorder the terms:
40 = 40 + 2w + -2w

Combine like terms: 2w + -2w = 0
40 = 40 + 0
40 = 40

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

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

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

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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