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Simplifying -7x2 + -140r + 700 = 0 Reorder the terms: 700 + -140r + -7x2 = 0 Solving 700 + -140r + -7x2 = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-700' to each side of the equation. 700 + -140r + -700 + -7x2 = 0 + -700 Reorder the terms: 700 + -700 + -140r + -7x2 = 0 + -700 Combine like terms: 700 + -700 = 0 0 + -140r + -7x2 = 0 + -700 -140r + -7x2 = 0 + -700 Combine like terms: 0 + -700 = -700 -140r + -7x2 = -700 Add '7x2' to each side of the equation. -140r + -7x2 + 7x2 = -700 + 7x2 Combine like terms: -7x2 + 7x2 = 0 -140r + 0 = -700 + 7x2 -140r = -700 + 7x2 Divide each side by '-140'. r = 5 + -0.05x2 Simplifying r = 5 + -0.05x2
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