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Simplifying 21 = -3v Solving 21 = -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 = -3v + 3v Combine like terms: -3v + 3v = 0 21 + 3v = 0 Add '-21' to each side of the equation. 21 + -21 + 3v = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 3v = 0 + -21 3v = 0 + -21 Combine like terms: 0 + -21 = -21 3v = -21 Divide each side by '3'. v = -7 Simplifying v = -7
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