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Simplifying -1.8(-5r + 7) + -0.2r = 0 Reorder the terms: -1.8(7 + -5r) + -0.2r = 0 (7 * -1.8 + -5r * -1.8) + -0.2r = 0 (-12.6 + 9r) + -0.2r = 0 Combine like terms: 9r + -0.2r = 8.8r -12.6 + 8.8r = 0 Solving -12.6 + 8.8r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12.6' to each side of the equation. -12.6 + 12.6 + 8.8r = 0 + 12.6 Combine like terms: -12.6 + 12.6 = 0.0 0.0 + 8.8r = 0 + 12.6 8.8r = 0 + 12.6 Combine like terms: 0 + 12.6 = 12.6 8.8r = 12.6 Divide each side by '8.8'. r = 1.431818182 Simplifying r = 1.431818182
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