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Simplifying -8r + 7 = -1r + -7 Reorder the terms: 7 + -8r = -1r + -7 Reorder the terms: 7 + -8r = -7 + -1r Solving 7 + -8r = -7 + -1r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add 'r' to each side of the equation. 7 + -8r + r = -7 + -1r + r Combine like terms: -8r + r = -7r 7 + -7r = -7 + -1r + r Combine like terms: -1r + r = 0 7 + -7r = -7 + 0 7 + -7r = -7 Add '-7' to each side of the equation. 7 + -7 + -7r = -7 + -7 Combine like terms: 7 + -7 = 0 0 + -7r = -7 + -7 -7r = -7 + -7 Combine like terms: -7 + -7 = -14 -7r = -14 Divide each side by '-7'. r = 2 Simplifying r = 2
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