-21=15w-12w

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Solution for -21=15w-12w equation:


Simplifying
-21 = 15w + -12w

Combine like terms: 15w + -12w = 3w
-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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