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Simplifying 3r + -11 = 7r + 9 Reorder the terms: -11 + 3r = 7r + 9 Reorder the terms: -11 + 3r = 9 + 7r Solving -11 + 3r = 9 + 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. -11 + 3r + -7r = 9 + 7r + -7r Combine like terms: 3r + -7r = -4r -11 + -4r = 9 + 7r + -7r Combine like terms: 7r + -7r = 0 -11 + -4r = 9 + 0 -11 + -4r = 9 Add '11' to each side of the equation. -11 + 11 + -4r = 9 + 11 Combine like terms: -11 + 11 = 0 0 + -4r = 9 + 11 -4r = 9 + 11 Combine like terms: 9 + 11 = 20 -4r = 20 Divide each side by '-4'. r = -5 Simplifying r = -5
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