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Simplifying 17r + -7 = 13r + 13 Reorder the terms: -7 + 17r = 13r + 13 Reorder the terms: -7 + 17r = 13 + 13r Solving -7 + 17r = 13 + 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 + 17r + -13r = 13 + 13r + -13r Combine like terms: 17r + -13r = 4r -7 + 4r = 13 + 13r + -13r Combine like terms: 13r + -13r = 0 -7 + 4r = 13 + 0 -7 + 4r = 13 Add '7' to each side of the equation. -7 + 7 + 4r = 13 + 7 Combine like terms: -7 + 7 = 0 0 + 4r = 13 + 7 4r = 13 + 7 Combine like terms: 13 + 7 = 20 4r = 20 Divide each side by '4'. r = 5 Simplifying r = 5
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