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Simplifying 1 + -7r = 8r + -2 Reorder the terms: 1 + -7r = -2 + 8r Solving 1 + -7r = -2 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. 1 + -7r + -8r = -2 + 8r + -8r Combine like terms: -7r + -8r = -15r 1 + -15r = -2 + 8r + -8r Combine like terms: 8r + -8r = 0 1 + -15r = -2 + 0 1 + -15r = -2 Add '-1' to each side of the equation. 1 + -1 + -15r = -2 + -1 Combine like terms: 1 + -1 = 0 0 + -15r = -2 + -1 -15r = -2 + -1 Combine like terms: -2 + -1 = -3 -15r = -3 Divide each side by '-15'. r = 0.2 Simplifying r = 0.2
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