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Simplifying 189 + -7r = 81r + 162 Reorder the terms: 189 + -7r = 162 + 81r Solving 189 + -7r = 162 + 81r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-81r' to each side of the equation. 189 + -7r + -81r = 162 + 81r + -81r Combine like terms: -7r + -81r = -88r 189 + -88r = 162 + 81r + -81r Combine like terms: 81r + -81r = 0 189 + -88r = 162 + 0 189 + -88r = 162 Add '-189' to each side of the equation. 189 + -189 + -88r = 162 + -189 Combine like terms: 189 + -189 = 0 0 + -88r = 162 + -189 -88r = 162 + -189 Combine like terms: 162 + -189 = -27 -88r = -27 Divide each side by '-88'. r = 0.3068181818 Simplifying r = 0.3068181818
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