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Simplifying 7(6r + 7) = -287 Reorder the terms: 7(7 + 6r) = -287 (7 * 7 + 6r * 7) = -287 (49 + 42r) = -287 Solving 49 + 42r = -287 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + 42r = -287 + -49 Combine like terms: 49 + -49 = 0 0 + 42r = -287 + -49 42r = -287 + -49 Combine like terms: -287 + -49 = -336 42r = -336 Divide each side by '42'. r = -8 Simplifying r = -8
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