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Simplifying 4r + 7 + -1t = 9 Reorder the terms: 7 + 4r + -1t = 9 Solving 7 + 4r + -1t = 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 + -1t = 9 + -7 Reorder the terms: 7 + -7 + 4r + -1t = 9 + -7 Combine like terms: 7 + -7 = 0 0 + 4r + -1t = 9 + -7 4r + -1t = 9 + -7 Combine like terms: 9 + -7 = 2 4r + -1t = 2 Add 't' to each side of the equation. 4r + -1t + t = 2 + t Combine like terms: -1t + t = 0 4r + 0 = 2 + t 4r = 2 + t Divide each side by '4'. r = 0.5 + 0.25t Simplifying r = 0.5 + 0.25t
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