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Simplifying 4r + -8 + 7 + -6r = -9r Reorder the terms: -8 + 7 + 4r + -6r = -9r Combine like terms: -8 + 7 = -1 -1 + 4r + -6r = -9r Combine like terms: 4r + -6r = -2r -1 + -2r = -9r Solving -1 + -2r = -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. -1 + -2r + 9r = -9r + 9r Combine like terms: -2r + 9r = 7r -1 + 7r = -9r + 9r Combine like terms: -9r + 9r = 0 -1 + 7r = 0 Add '1' to each side of the equation. -1 + 1 + 7r = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 7r = 0 + 1 7r = 0 + 1 Combine like terms: 0 + 1 = 1 7r = 1 Divide each side by '7'. r = 0.1428571429 Simplifying r = 0.1428571429
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