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Simplifying 2 + -9(8r + 1) = 5r + -8 Reorder the terms: 2 + -9(1 + 8r) = 5r + -8 2 + (1 * -9 + 8r * -9) = 5r + -8 2 + (-9 + -72r) = 5r + -8 Combine like terms: 2 + -9 = -7 -7 + -72r = 5r + -8 Reorder the terms: -7 + -72r = -8 + 5r Solving -7 + -72r = -8 + 5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-5r' to each side of the equation. -7 + -72r + -5r = -8 + 5r + -5r Combine like terms: -72r + -5r = -77r -7 + -77r = -8 + 5r + -5r Combine like terms: 5r + -5r = 0 -7 + -77r = -8 + 0 -7 + -77r = -8 Add '7' to each side of the equation. -7 + 7 + -77r = -8 + 7 Combine like terms: -7 + 7 = 0 0 + -77r = -8 + 7 -77r = -8 + 7 Combine like terms: -8 + 7 = -1 -77r = -1 Divide each side by '-77'. r = 0.01298701299 Simplifying r = 0.01298701299
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