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Simplifying 20r + 240 = 80r + -480 Reorder the terms: 240 + 20r = 80r + -480 Reorder the terms: 240 + 20r = -480 + 80r Solving 240 + 20r = -480 + 80r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-80r' to each side of the equation. 240 + 20r + -80r = -480 + 80r + -80r Combine like terms: 20r + -80r = -60r 240 + -60r = -480 + 80r + -80r Combine like terms: 80r + -80r = 0 240 + -60r = -480 + 0 240 + -60r = -480 Add '-240' to each side of the equation. 240 + -240 + -60r = -480 + -240 Combine like terms: 240 + -240 = 0 0 + -60r = -480 + -240 -60r = -480 + -240 Combine like terms: -480 + -240 = -720 -60r = -720 Divide each side by '-60'. r = 12 Simplifying r = 12
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