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Simplifying r(2) + -7r + 10 = 0 Reorder the terms for easier multiplication: 2r + -7r + 10 = 0 Reorder the terms: 10 + 2r + -7r = 0 Combine like terms: 2r + -7r = -5r 10 + -5r = 0 Solving 10 + -5r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + -5r = 0 + -10 Combine like terms: 10 + -10 = 0 0 + -5r = 0 + -10 -5r = 0 + -10 Combine like terms: 0 + -10 = -10 -5r = -10 Divide each side by '-5'. r = 2 Simplifying r = 2
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