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Simplifying 2r + 55 = 6r + 72r Reorder the terms: 55 + 2r = 6r + 72r Combine like terms: 6r + 72r = 78r 55 + 2r = 78r Solving 55 + 2r = 78r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-78r' to each side of the equation. 55 + 2r + -78r = 78r + -78r Combine like terms: 2r + -78r = -76r 55 + -76r = 78r + -78r Combine like terms: 78r + -78r = 0 55 + -76r = 0 Add '-55' to each side of the equation. 55 + -55 + -76r = 0 + -55 Combine like terms: 55 + -55 = 0 0 + -76r = 0 + -55 -76r = 0 + -55 Combine like terms: 0 + -55 = -55 -76r = -55 Divide each side by '-76'. r = 0.7236842105 Simplifying r = 0.7236842105
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