w+(w+21)=57

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Solution for w+(w+21)=57 equation: 


Simplifying
w + (w + 21) = 57

Reorder the terms:
w + (21 + w) = 57

Remove parenthesis around (21 + w)
w + 21 + w = 57

Reorder the terms:
21 + w + w = 57

Combine like terms: w + w = 2w
21 + 2w = 57

Solving
21 + 2w = 57

Solving for variable 'w'.

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

Add '-21' to each side of the equation.
21 + -21 + 2w = 57 + -21

Combine like terms: 21 + -21 = 0
0 + 2w = 57 + -21
2w = 57 + -21

Combine like terms: 57 + -21 = 36
2w = 36

Divide each side by '2'.
w = 18

Simplifying
w = 18

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