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Simplifying 3(230 + r) = 0 (230 * 3 + r * 3) = 0 (690 + 3r) = 0 Solving 690 + 3r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-690' to each side of the equation. 690 + -690 + 3r = 0 + -690 Combine like terms: 690 + -690 = 0 0 + 3r = 0 + -690 3r = 0 + -690 Combine like terms: 0 + -690 = -690 3r = -690 Divide each side by '3'. r = -230 Simplifying r = -230
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