w-12=-21+2w

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Solution for w-12=-21+2w equation:


Simplifying
w + -12 = -21 + 2w

Reorder the terms:
-12 + w = -21 + 2w

Solving
-12 + w = -21 + 2w

Solving for variable 'w'.

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

Add '-2w' to each side of the equation.
-12 + w + -2w = -21 + 2w + -2w

Combine like terms: w + -2w = -1w
-12 + -1w = -21 + 2w + -2w

Combine like terms: 2w + -2w = 0
-12 + -1w = -21 + 0
-12 + -1w = -21

Add '12' to each side of the equation.
-12 + 12 + -1w = -21 + 12

Combine like terms: -12 + 12 = 0
0 + -1w = -21 + 12
-1w = -21 + 12

Combine like terms: -21 + 12 = -9
-1w = -9

Divide each side by '-1'.
w = 9

Simplifying
w = 9

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