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Simplifying t2 + 4r + -1 = 0 Reorder the terms: -1 + 4r + t2 = 0 Solving -1 + 4r + t2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 4r + 1 + t2 = 0 + 1 Reorder the terms: -1 + 1 + 4r + t2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 4r + t2 = 0 + 1 4r + t2 = 0 + 1 Combine like terms: 0 + 1 = 1 4r + t2 = 1 Add '-1t2' to each side of the equation. 4r + t2 + -1t2 = 1 + -1t2 Combine like terms: t2 + -1t2 = 0 4r + 0 = 1 + -1t2 4r = 1 + -1t2 Divide each side by '4'. r = 0.25 + -0.25t2 Simplifying r = 0.25 + -0.25t2
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