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Simplifying 7 = 5 + -9r Solving 7 = 5 + -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. 7 + 9r = 5 + -9r + 9r Combine like terms: -9r + 9r = 0 7 + 9r = 5 + 0 7 + 9r = 5 Add '-7' to each side of the equation. 7 + -7 + 9r = 5 + -7 Combine like terms: 7 + -7 = 0 0 + 9r = 5 + -7 9r = 5 + -7 Combine like terms: 5 + -7 = -2 9r = -2 Divide each side by '9'. r = -0.2222222222 Simplifying r = -0.2222222222
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