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Simplifying 13 + r = 3 + 6r Solving 13 + r = 3 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 13 + r + -6r = 3 + 6r + -6r Combine like terms: r + -6r = -5r 13 + -5r = 3 + 6r + -6r Combine like terms: 6r + -6r = 0 13 + -5r = 3 + 0 13 + -5r = 3 Add '-13' to each side of the equation. 13 + -13 + -5r = 3 + -13 Combine like terms: 13 + -13 = 0 0 + -5r = 3 + -13 -5r = 3 + -13 Combine like terms: 3 + -13 = -10 -5r = -10 Divide each side by '-5'. r = 2 Simplifying r = 2
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