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Simplifying 4r + 8 = -122 + -9r Reorder the terms: 8 + 4r = -122 + -9r Solving 8 + 4r = -122 + -9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9r' to each side of the equation. 8 + 4r + 9r = -122 + -9r + 9r Combine like terms: 4r + 9r = 13r 8 + 13r = -122 + -9r + 9r Combine like terms: -9r + 9r = 0 8 + 13r = -122 + 0 8 + 13r = -122 Add '-8' to each side of the equation. 8 + -8 + 13r = -122 + -8 Combine like terms: 8 + -8 = 0 0 + 13r = -122 + -8 13r = -122 + -8 Combine like terms: -122 + -8 = -130 13r = -130 Divide each side by '13'. r = -10 Simplifying r = -10
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