-3w-(-9)=12

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Solution for -3w-(-9)=12 equation: 


Simplifying
-3w + -1(-9) = 12

Multiply -1 * -9
-3w + 9 = 12

Reorder the terms:
9 + -3w = 12

Solving
9 + -3w = 12

Solving for variable 'w'.

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

Add '-9' to each side of the equation.
9 + -9 + -3w = 12 + -9

Combine like terms: 9 + -9 = 0
0 + -3w = 12 + -9
-3w = 12 + -9

Combine like terms: 12 + -9 = 3
-3w = 3

Divide each side by '-3'.
w = -1

Simplifying
w = -1

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