5-2w=21

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Solution for 5-2w=21 equation: 


Simplifying
5 + -2w = 21

Solving
5 + -2w = 21

Solving for variable 'w'.

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

Add '-5' to each side of the equation.
5 + -5 + -2w = 21 + -5

Combine like terms: 5 + -5 = 0
0 + -2w = 21 + -5
-2w = 21 + -5

Combine like terms: 21 + -5 = 16
-2w = 16

Divide each side by '-2'.
w = -8

Simplifying
w = -8

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