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Simplifying 9r + -16 = -12 + 7r Reorder the terms: -16 + 9r = -12 + 7r Solving -16 + 9r = -12 + 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. -16 + 9r + -7r = -12 + 7r + -7r Combine like terms: 9r + -7r = 2r -16 + 2r = -12 + 7r + -7r Combine like terms: 7r + -7r = 0 -16 + 2r = -12 + 0 -16 + 2r = -12 Add '16' to each side of the equation. -16 + 16 + 2r = -12 + 16 Combine like terms: -16 + 16 = 0 0 + 2r = -12 + 16 2r = -12 + 16 Combine like terms: -12 + 16 = 4 2r = 4 Divide each side by '2'. r = 2 Simplifying r = 2
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