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Simplifying 9 = -4r + 6r + -5 Reorder the terms: 9 = -5 + -4r + 6r Combine like terms: -4r + 6r = 2r 9 = -5 + 2r Solving 9 = -5 + 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. 9 + -2r = -5 + 2r + -2r Combine like terms: 2r + -2r = 0 9 + -2r = -5 + 0 9 + -2r = -5 Add '-9' to each side of the equation. 9 + -9 + -2r = -5 + -9 Combine like terms: 9 + -9 = 0 0 + -2r = -5 + -9 -2r = -5 + -9 Combine like terms: -5 + -9 = -14 -2r = -14 Divide each side by '-2'. r = 7 Simplifying r = 7
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