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Simplifying 8r + 8(r + 25) = 920 Reorder the terms: 8r + 8(25 + r) = 920 8r + (25 * 8 + r * 8) = 920 8r + (200 + 8r) = 920 Reorder the terms: 200 + 8r + 8r = 920 Combine like terms: 8r + 8r = 16r 200 + 16r = 920 Solving 200 + 16r = 920 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-200' to each side of the equation. 200 + -200 + 16r = 920 + -200 Combine like terms: 200 + -200 = 0 0 + 16r = 920 + -200 16r = 920 + -200 Combine like terms: 920 + -200 = 720 16r = 720 Divide each side by '16'. r = 45 Simplifying r = 45
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