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Simplifying 0 = -1(7r + s) 0 = (7r * -1 + s * -1) 0 = (-7r + -1s) Solving 0 = -7r + -1s 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. 0 + 7r = -7r + 7r + -1s Remove the zero: 7r = -7r + 7r + -1s Combine like terms: -7r + 7r = 0 7r = 0 + -1s 7r = -1s Divide each side by '7'. r = -0.1428571429s Simplifying r = -0.1428571429s
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