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Simplifying 9r + -16 = -9 + 8r Reorder the terms: -16 + 9r = -9 + 8r Solving -16 + 9r = -9 + 8r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-8r' to each side of the equation. -16 + 9r + -8r = -9 + 8r + -8r Combine like terms: 9r + -8r = 1r -16 + 1r = -9 + 8r + -8r Combine like terms: 8r + -8r = 0 -16 + 1r = -9 + 0 -16 + 1r = -9 Add '16' to each side of the equation. -16 + 16 + 1r = -9 + 16 Combine like terms: -16 + 16 = 0 0 + 1r = -9 + 16 1r = -9 + 16 Combine like terms: -9 + 16 = 7 1r = 7 Divide each side by '1'. r = 7 Simplifying r = 7
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