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Simplifying 7 + 5r + 2r = r + -5 Combine like terms: 5r + 2r = 7r 7 + 7r = r + -5 Reorder the terms: 7 + 7r = -5 + r Solving 7 + 7r = -5 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. 7 + 7r + -1r = -5 + r + -1r Combine like terms: 7r + -1r = 6r 7 + 6r = -5 + r + -1r Combine like terms: r + -1r = 0 7 + 6r = -5 + 0 7 + 6r = -5 Add '-7' to each side of the equation. 7 + -7 + 6r = -5 + -7 Combine like terms: 7 + -7 = 0 0 + 6r = -5 + -7 6r = -5 + -7 Combine like terms: -5 + -7 = -12 6r = -12 Divide each side by '6'. r = -2 Simplifying r = -2
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