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Simplifying -54 + -2r = -1v + 21 Reorder the terms: -54 + -2r = 21 + -1v Solving -54 + -2r = 21 + -1v Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '54' to each side of the equation. -54 + 54 + -2r = 21 + 54 + -1v Combine like terms: -54 + 54 = 0 0 + -2r = 21 + 54 + -1v -2r = 21 + 54 + -1v Combine like terms: 21 + 54 = 75 -2r = 75 + -1v Divide each side by '-2'. r = -37.5 + 0.5v Simplifying r = -37.5 + 0.5v
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