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