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Simplifying 5x2 + -72r + -45 = 0 Reorder the terms: -45 + -72r + 5x2 = 0 Solving -45 + -72r + 5x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '45' to each side of the equation. -45 + -72r + 45 + 5x2 = 0 + 45 Reorder the terms: -45 + 45 + -72r + 5x2 = 0 + 45 Combine like terms: -45 + 45 = 0 0 + -72r + 5x2 = 0 + 45 -72r + 5x2 = 0 + 45 Combine like terms: 0 + 45 = 45 -72r + 5x2 = 45 Add '-5x2' to each side of the equation. -72r + 5x2 + -5x2 = 45 + -5x2 Combine like terms: 5x2 + -5x2 = 0 -72r + 0 = 45 + -5x2 -72r = 45 + -5x2 Divide each side by '-72'. r = -0.625 + 0.06944444444x2 Simplifying r = -0.625 + 0.06944444444x2
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