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Simplifying x2 + 10r + 14 = -7 Reorder the terms: 14 + 10r + x2 = -7 Solving 14 + 10r + x2 = -7 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-14' to each side of the equation. 14 + 10r + -14 + x2 = -7 + -14 Reorder the terms: 14 + -14 + 10r + x2 = -7 + -14 Combine like terms: 14 + -14 = 0 0 + 10r + x2 = -7 + -14 10r + x2 = -7 + -14 Combine like terms: -7 + -14 = -21 10r + x2 = -21 Add '-1x2' to each side of the equation. 10r + x2 + -1x2 = -21 + -1x2 Combine like terms: x2 + -1x2 = 0 10r + 0 = -21 + -1x2 10r = -21 + -1x2 Divide each side by '10'. r = -2.1 + -0.1x2 Simplifying r = -2.1 + -0.1x2
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