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Simplifying -2.1(2r + 7) + 4.6r = 0 Reorder the terms: -2.1(7 + 2r) + 4.6r = 0 (7 * -2.1 + 2r * -2.1) + 4.6r = 0 (-14.7 + -4.2r) + 4.6r = 0 Combine like terms: -4.2r + 4.6r = 0.4r -14.7 + 0.4r = 0 Solving -14.7 + 0.4r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '14.7' to each side of the equation. -14.7 + 14.7 + 0.4r = 0 + 14.7 Combine like terms: -14.7 + 14.7 = 0.0 0.0 + 0.4r = 0 + 14.7 0.4r = 0 + 14.7 Combine like terms: 0 + 14.7 = 14.7 0.4r = 14.7 Divide each side by '0.4'. r = 36.75 Simplifying r = 36.75
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