-21=-7w

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Solution for -21=-7w equation:


Simplifying
-21 = -7w

Solving
-21 = -7w

Solving for variable 'w'.

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

Add '7w' to each side of the equation.
-21 + 7w = -7w + 7w

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

Add '21' to each side of the equation.
-21 + 21 + 7w = 0 + 21

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

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

Divide each side by '7'.
w = 3

Simplifying
w = 3

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