2w+7w=84-21

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Solution for 2w+7w=84-21 equation: 


Simplifying
2w + 7w = 84 + -21

Combine like terms: 2w + 7w = 9w
9w = 84 + -21

Combine like terms: 84 + -21 = 63
9w = 63

Solving
9w = 63

Solving for variable 'w'.

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

Divide each side by '9'.
w = 7

Simplifying
w = 7

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