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Simplifying 0 = 12r + 8 + 12 Reorder the terms: 0 = 8 + 12 + 12r Combine like terms: 8 + 12 = 20 0 = 20 + 12r Solving 0 = 20 + 12r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-12r' to each side of the equation. 0 + -12r = 20 + 12r + -12r Remove the zero: -12r = 20 + 12r + -12r Combine like terms: 12r + -12r = 0 -12r = 20 + 0 -12r = 20 Divide each side by '-12'. r = -1.666666667 Simplifying r = -1.666666667
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