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Simplifying 9 + 7r + -7 = 6 + -3r Reorder the terms: 9 + -7 + 7r = 6 + -3r Combine like terms: 9 + -7 = 2 2 + 7r = 6 + -3r Solving 2 + 7r = 6 + -3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3r' to each side of the equation. 2 + 7r + 3r = 6 + -3r + 3r Combine like terms: 7r + 3r = 10r 2 + 10r = 6 + -3r + 3r Combine like terms: -3r + 3r = 0 2 + 10r = 6 + 0 2 + 10r = 6 Add '-2' to each side of the equation. 2 + -2 + 10r = 6 + -2 Combine like terms: 2 + -2 = 0 0 + 10r = 6 + -2 10r = 6 + -2 Combine like terms: 6 + -2 = 4 10r = 4 Divide each side by '10'. r = 0.4 Simplifying r = 0.4
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