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Simplifying 9r + 3s + -2t(-9r) + 4t + -1s = 0 Remove parenthesis around (-9r) 9r + 3s + -2t * -9r + 4t + -1s = 0 Reorder the terms for easier multiplication: 9r + 3s + -2 * -9t * r + 4t + -1s = 0 Multiply -2 * -9 9r + 3s + 18t * r + 4t + -1s = 0 Multiply t * r 9r + 3s + 18rt + 4t + -1s = 0 Reorder the terms: 9r + 18rt + 3s + -1s + 4t = 0 Combine like terms: 3s + -1s = 2s 9r + 18rt + 2s + 4t = 0 Solving 9r + 18rt + 2s + 4t = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2s' to each side of the equation. 9r + 18rt + 2s + -2s + 4t = 0 + -2s Combine like terms: 2s + -2s = 0 9r + 18rt + 0 + 4t = 0 + -2s 9r + 18rt + 4t = 0 + -2s Remove the zero: 9r + 18rt + 4t = -2s Add '-4t' to each side of the equation. 9r + 18rt + 4t + -4t = -2s + -4t Combine like terms: 4t + -4t = 0 9r + 18rt + 0 = -2s + -4t 9r + 18rt = -2s + -4t Reorder the terms: 9r + 18rt + 2s + 4t = -2s + 2s + -4t + 4t Combine like terms: -2s + 2s = 0 9r + 18rt + 2s + 4t = 0 + -4t + 4t 9r + 18rt + 2s + 4t = -4t + 4t Combine like terms: -4t + 4t = 0 9r + 18rt + 2s + 4t = 0 The solution to this equation could not be determined.
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