21-3(2-w)=12

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Solution for 21-3(2-w)=12 equation:


Simplifying
21 + -3(2 + -1w) = 12
21 + (2 * -3 + -1w * -3) = 12
21 + (-6 + 3w) = 12

Combine like terms: 21 + -6 = 15
15 + 3w = 12

Solving
15 + 3w = 12

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 + 3w = 12 + -15

Combine like terms: 15 + -15 = 0
0 + 3w = 12 + -15
3w = 12 + -15

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

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

Simplifying
w = -1

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