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Simplifying 4x2 + 20v + 21 = 0 Reorder the terms: 21 + 20v + 4x2 = 0 Solving 21 + 20v + 4x2 = 0 Solving for variable 'v'. Move all terms containing v to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + 20v + -21 + 4x2 = 0 + -21 Reorder the terms: 21 + -21 + 20v + 4x2 = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 20v + 4x2 = 0 + -21 20v + 4x2 = 0 + -21 Combine like terms: 0 + -21 = -21 20v + 4x2 = -21 Add '-4x2' to each side of the equation. 20v + 4x2 + -4x2 = -21 + -4x2 Combine like terms: 4x2 + -4x2 = 0 20v + 0 = -21 + -4x2 20v = -21 + -4x2 Divide each side by '20'. v = -1.05 + -0.2x2 Simplifying v = -1.05 + -0.2x2
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