3w=21-4w

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Solution for 3w=21-4w equation: 


Simplifying
3w = 21 + -4w

Solving
3w = 21 + -4w

Solving for variable 'w'.

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

Add '4w' to each side of the equation.
3w + 4w = 21 + -4w + 4w

Combine like terms: 3w + 4w = 7w
7w = 21 + -4w + 4w

Combine like terms: -4w + 4w = 0
7w = 21 + 0
7w = 21

Divide each side by '7'.
w = 3

Simplifying
w = 3

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