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Simplifying 7r + -4 = -13 + r Reorder the terms: -4 + 7r = -13 + r Solving -4 + 7r = -13 + 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. -4 + 7r + -1r = -13 + r + -1r Combine like terms: 7r + -1r = 6r -4 + 6r = -13 + r + -1r Combine like terms: r + -1r = 0 -4 + 6r = -13 + 0 -4 + 6r = -13 Add '4' to each side of the equation. -4 + 4 + 6r = -13 + 4 Combine like terms: -4 + 4 = 0 0 + 6r = -13 + 4 6r = -13 + 4 Combine like terms: -13 + 4 = -9 6r = -9 Divide each side by '6'. r = -1.5 Simplifying r = -1.5
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