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Simplifying 7r + -2 = 13 + 4r Reorder the terms: -2 + 7r = 13 + 4r Solving -2 + 7r = 13 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -2 + 7r + -4r = 13 + 4r + -4r Combine like terms: 7r + -4r = 3r -2 + 3r = 13 + 4r + -4r Combine like terms: 4r + -4r = 0 -2 + 3r = 13 + 0 -2 + 3r = 13 Add '2' to each side of the equation. -2 + 2 + 3r = 13 + 2 Combine like terms: -2 + 2 = 0 0 + 3r = 13 + 2 3r = 13 + 2 Combine like terms: 13 + 2 = 15 3r = 15 Divide each side by '3'. r = 5 Simplifying r = 5
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