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Simplifying 4.2r + 7.14 = 12.6 Reorder the terms: 7.14 + 4.2r = 12.6 Solving 7.14 + 4.2r = 12.6 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7.14' to each side of the equation. 7.14 + -7.14 + 4.2r = 12.6 + -7.14 Combine like terms: 7.14 + -7.14 = 0.00 0.00 + 4.2r = 12.6 + -7.14 4.2r = 12.6 + -7.14 Combine like terms: 12.6 + -7.14 = 5.46 4.2r = 5.46 Divide each side by '4.2'. r = 1.3 Simplifying r = 1.3
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