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Simplifying 8(r + 2) = 9r Reorder the terms: 8(2 + r) = 9r (2 * 8 + r * 8) = 9r (16 + 8r) = 9r Solving 16 + 8r = 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. 16 + 8r + -9r = 9r + -9r Combine like terms: 8r + -9r = -1r 16 + -1r = 9r + -9r Combine like terms: 9r + -9r = 0 16 + -1r = 0 Add '-16' to each side of the equation. 16 + -16 + -1r = 0 + -16 Combine like terms: 16 + -16 = 0 0 + -1r = 0 + -16 -1r = 0 + -16 Combine like terms: 0 + -16 = -16 -1r = -16 Divide each side by '-1'. r = 16 Simplifying r = 16
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