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Simplifying 8(r + 30) + 8r = 800 Reorder the terms: 8(30 + r) + 8r = 800 (30 * 8 + r * 8) + 8r = 800 (240 + 8r) + 8r = 800 Combine like terms: 8r + 8r = 16r 240 + 16r = 800 Solving 240 + 16r = 800 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-240' to each side of the equation. 240 + -240 + 16r = 800 + -240 Combine like terms: 240 + -240 = 0 0 + 16r = 800 + -240 16r = 800 + -240 Combine like terms: 800 + -240 = 560 16r = 560 Divide each side by '16'. r = 35 Simplifying r = 35
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