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Simplifying -9r + 5 = 9r + 7 Reorder the terms: 5 + -9r = 9r + 7 Reorder the terms: 5 + -9r = 7 + 9r Solving 5 + -9r = 7 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. 5 + -9r + -9r = 7 + 9r + -9r Combine like terms: -9r + -9r = -18r 5 + -18r = 7 + 9r + -9r Combine like terms: 9r + -9r = 0 5 + -18r = 7 + 0 5 + -18r = 7 Add '-5' to each side of the equation. 5 + -5 + -18r = 7 + -5 Combine like terms: 5 + -5 = 0 0 + -18r = 7 + -5 -18r = 7 + -5 Combine like terms: 7 + -5 = 2 -18r = 2 Divide each side by '-18'. r = -0.1111111111 Simplifying r = -0.1111111111
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