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Simplifying -7r + -4r = 30 Combine like terms: -7r + -4r = -11r -11r = 30 Solving -11r = 30 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '-11'. r = -2.727272727 Simplifying r = -2.727272727
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