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Simplifying 21 = -3(12 + V) 21 = (12 * -3 + V * -3) 21 = (-36 + -3V) Solving 21 = -36 + -3V Solving for variable 'V'. Move all terms containing V to the left, all other terms to the right. Add '3V' to each side of the equation. 21 + 3V = -36 + -3V + 3V Combine like terms: -3V + 3V = 0 21 + 3V = -36 + 0 21 + 3V = -36 Add '-21' to each side of the equation. 21 + -21 + 3V = -36 + -21 Combine like terms: 21 + -21 = 0 0 + 3V = -36 + -21 3V = -36 + -21 Combine like terms: -36 + -21 = -57 3V = -57 Divide each side by '3'. V = -19 Simplifying V = -19
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