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Simplifying 8 + -6r = 7 + -7r Solving 8 + -6r = 7 + -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. 8 + -6r + 7r = 7 + -7r + 7r Combine like terms: -6r + 7r = 1r 8 + 1r = 7 + -7r + 7r Combine like terms: -7r + 7r = 0 8 + 1r = 7 + 0 8 + 1r = 7 Add '-8' to each side of the equation. 8 + -8 + 1r = 7 + -8 Combine like terms: 8 + -8 = 0 0 + 1r = 7 + -8 1r = 7 + -8 Combine like terms: 7 + -8 = -1 1r = -1 Divide each side by '1'. r = -1 Simplifying r = -1
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