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Simplifying r + 8 = 3r Reorder the terms: 8 + r = 3r Solving 8 + r = 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 8 + r + -3r = 3r + -3r Combine like terms: r + -3r = -2r 8 + -2r = 3r + -3r Combine like terms: 3r + -3r = 0 8 + -2r = 0 Add '-8' to each side of the equation. 8 + -8 + -2r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -2r = 0 + -8 -2r = 0 + -8 Combine like terms: 0 + -8 = -8 -2r = -8 Divide each side by '-2'. r = 4 Simplifying r = 4
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