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Simplifying 9 + 4r = 1 + -2r Solving 9 + 4r = 1 + -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 + 4r + 2r = 1 + -2r + 2r Combine like terms: 4r + 2r = 6r 9 + 6r = 1 + -2r + 2r Combine like terms: -2r + 2r = 0 9 + 6r = 1 + 0 9 + 6r = 1 Add '-9' to each side of the equation. 9 + -9 + 6r = 1 + -9 Combine like terms: 9 + -9 = 0 0 + 6r = 1 + -9 6r = 1 + -9 Combine like terms: 1 + -9 = -8 6r = -8 Divide each side by '6'. r = -1.333333333 Simplifying r = -1.333333333
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