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Simplifying 64 = 8(r + 1) Reorder the terms: 64 = 8(1 + r) 64 = (1 * 8 + r * 8) 64 = (8 + 8r) Solving 64 = 8 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. 64 + -8r = 8 + 8r + -8r Combine like terms: 8r + -8r = 0 64 + -8r = 8 + 0 64 + -8r = 8 Add '-64' to each side of the equation. 64 + -64 + -8r = 8 + -64 Combine like terms: 64 + -64 = 0 0 + -8r = 8 + -64 -8r = 8 + -64 Combine like terms: 8 + -64 = -56 -8r = -56 Divide each side by '-8'. r = 7 Simplifying r = 7
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