9w+21=3w-21

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Solution for 9w+21=3w-21 equation:


Simplifying
9w + 21 = 3w + -21

Reorder the terms:
21 + 9w = 3w + -21

Reorder the terms:
21 + 9w = -21 + 3w

Solving
21 + 9w = -21 + 3w

Solving for variable 'w'.

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

Add '-3w' to each side of the equation.
21 + 9w + -3w = -21 + 3w + -3w

Combine like terms: 9w + -3w = 6w
21 + 6w = -21 + 3w + -3w

Combine like terms: 3w + -3w = 0
21 + 6w = -21 + 0
21 + 6w = -21

Add '-21' to each side of the equation.
21 + -21 + 6w = -21 + -21

Combine like terms: 21 + -21 = 0
0 + 6w = -21 + -21
6w = -21 + -21

Combine like terms: -21 + -21 = -42
6w = -42

Divide each side by '6'.
w = -7

Simplifying
w = -7

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