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Simplifying -1v + 21 = -4v Reorder the terms: 21 + -1v = -4v Solving 21 + -1v = -4v Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '4v' to each side of the equation. 21 + -1v + 4v = -4v + 4v Combine like terms: -1v + 4v = 3v 21 + 3v = -4v + 4v Combine like terms: -4v + 4v = 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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