15-w=-21

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Solution for 15-w=-21 equation: 


Simplifying
15 + -1w = -21

Solving
15 + -1w = -21

Solving for variable 'w'.

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

Add '-15' to each side of the equation.
15 + -15 + -1w = -21 + -15

Combine like terms: 15 + -15 = 0
0 + -1w = -21 + -15
-1w = -21 + -15

Combine like terms: -21 + -15 = -36
-1w = -36

Divide each side by '-1'.
w = 36

Simplifying
w = 36

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