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Simplifying 13 + -2r = 3 + -7r Solving 13 + -2r = 3 + -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. 13 + -2r + 7r = 3 + -7r + 7r Combine like terms: -2r + 7r = 5r 13 + 5r = 3 + -7r + 7r Combine like terms: -7r + 7r = 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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