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Simplifying -12 + 4r = 7r + 17 Reorder the terms: -12 + 4r = 17 + 7r Solving -12 + 4r = 17 + 7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7r' to each side of the equation. -12 + 4r + -7r = 17 + 7r + -7r Combine like terms: 4r + -7r = -3r -12 + -3r = 17 + 7r + -7r Combine like terms: 7r + -7r = 0 -12 + -3r = 17 + 0 -12 + -3r = 17 Add '12' to each side of the equation. -12 + 12 + -3r = 17 + 12 Combine like terms: -12 + 12 = 0 0 + -3r = 17 + 12 -3r = 17 + 12 Combine like terms: 17 + 12 = 29 -3r = 29 Divide each side by '-3'. r = -9.666666667 Simplifying r = -9.666666667
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