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Simplifying 91 = -7r Solving 91 = -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. 91 + 7r = -7r + 7r Combine like terms: -7r + 7r = 0 91 + 7r = 0 Add '-91' to each side of the equation. 91 + -91 + 7r = 0 + -91 Combine like terms: 91 + -91 = 0 0 + 7r = 0 + -91 7r = 0 + -91 Combine like terms: 0 + -91 = -91 7r = -91 Divide each side by '7'. r = -13 Simplifying r = -13
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