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Simplifying 6(2 + 5r) + 7 = -155 (2 * 6 + 5r * 6) + 7 = -155 (12 + 30r) + 7 = -155 Reorder the terms: 12 + 7 + 30r = -155 Combine like terms: 12 + 7 = 19 19 + 30r = -155 Solving 19 + 30r = -155 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-19' to each side of the equation. 19 + -19 + 30r = -155 + -19 Combine like terms: 19 + -19 = 0 0 + 30r = -155 + -19 30r = -155 + -19 Combine like terms: -155 + -19 = -174 30r = -174 Divide each side by '30'. r = -5.8 Simplifying r = -5.8
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