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Simplifying -2t + 4r + -7 = 9 Reorder the terms: -7 + 4r + -2t = 9 Solving -7 + 4r + -2t = 9 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7' to each side of the equation. -7 + 4r + 7 + -2t = 9 + 7 Reorder the terms: -7 + 7 + 4r + -2t = 9 + 7 Combine like terms: -7 + 7 = 0 0 + 4r + -2t = 9 + 7 4r + -2t = 9 + 7 Combine like terms: 9 + 7 = 16 4r + -2t = 16 Add '2t' to each side of the equation. 4r + -2t + 2t = 16 + 2t Combine like terms: -2t + 2t = 0 4r + 0 = 16 + 2t 4r = 16 + 2t Divide each side by '4'. r = 4 + 0.5t Simplifying r = 4 + 0.5t
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