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Simplifying -3r + -4r + -10r = -12 Combine like terms: -3r + -4r = -7r -7r + -10r = -12 Combine like terms: -7r + -10r = -17r -17r = -12 Solving -17r = -12 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Divide each side by '-17'. r = 0.7058823529 Simplifying r = 0.7058823529
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