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Simplifying (7r + s + 4) = 0 Reorder the terms: (4 + 7r + s) = 0 Remove parenthesis around (4 + 7r + s) 4 + 7r + s = 0 Solving 4 + 7r + s = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + 7r + -4 + s = 0 + -4 Reorder the terms: 4 + -4 + 7r + s = 0 + -4 Combine like terms: 4 + -4 = 0 0 + 7r + s = 0 + -4 7r + s = 0 + -4 Combine like terms: 0 + -4 = -4 7r + s = -4 Add '-1s' to each side of the equation. 7r + s + -1s = -4 + -1s Combine like terms: s + -1s = 0 7r + 0 = -4 + -1s 7r = -4 + -1s Divide each side by '7'. r = -0.5714285714 + -0.1428571429s Simplifying r = -0.5714285714 + -0.1428571429s
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