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Simplifying 2r + 3s + -1t = -3 Solving 2r + 3s + -1t = -3 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3s' to each side of the equation. 2r + 3s + -3s + -1t = -3 + -3s Combine like terms: 3s + -3s = 0 2r + 0 + -1t = -3 + -3s 2r + -1t = -3 + -3s Add 't' to each side of the equation. 2r + -1t + t = -3 + -3s + t Combine like terms: -1t + t = 0 2r + 0 = -3 + -3s + t 2r = -3 + -3s + t Divide each side by '2'. r = -1.5 + -1.5s + 0.5t Simplifying r = -1.5 + -1.5s + 0.5t
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