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Simplifying 9r + -11 = -1 + 4r Reorder the terms: -11 + 9r = -1 + 4r Solving -11 + 9r = -1 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -11 + 9r + -4r = -1 + 4r + -4r Combine like terms: 9r + -4r = 5r -11 + 5r = -1 + 4r + -4r Combine like terms: 4r + -4r = 0 -11 + 5r = -1 + 0 -11 + 5r = -1 Add '11' to each side of the equation. -11 + 11 + 5r = -1 + 11 Combine like terms: -11 + 11 = 0 0 + 5r = -1 + 11 5r = -1 + 11 Combine like terms: -1 + 11 = 10 5r = 10 Divide each side by '5'. r = 2 Simplifying r = 2
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