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Simplifying -4.1r + 3.6 = -21 Reorder the terms: 3.6 + -4.1r = -21 Solving 3.6 + -4.1r = -21 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3.6' to each side of the equation. 3.6 + -3.6 + -4.1r = -21 + -3.6 Combine like terms: 3.6 + -3.6 = 0.0 0.0 + -4.1r = -21 + -3.6 -4.1r = -21 + -3.6 Combine like terms: -21 + -3.6 = -24.6 -4.1r = -24.6 Divide each side by '-4.1'. r = 6 Simplifying r = 6
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