-21=-3w

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Solution for -21=-3w equation:


Simplifying
-21 = -3w

Solving
-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 + 3w = -3w + 3w

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

Add '21' to each side of the equation.
-21 + 21 + 3w = 0 + 21

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

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

Divide each side by '3'.
w = 7

Simplifying
w = 7

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