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Simplifying 6r + 13 = 13 + 7r Reorder the terms: 13 + 6r = 13 + 7r Add '-13' to each side of the equation. 13 + -13 + 6r = 13 + -13 + 7r Combine like terms: 13 + -13 = 0 0 + 6r = 13 + -13 + 7r 6r = 13 + -13 + 7r Combine like terms: 13 + -13 = 0 6r = 0 + 7r 6r = 7r Solving 6r = 7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-7r' to each side of the equation. 6r + -7r = 7r + -7r Combine like terms: 6r + -7r = -1r -1r = 7r + -7r Combine like terms: 7r + -7r = 0 -1r = 0 Divide each side by '-1'. r = 0 Simplifying r = 0
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