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Simplifying 3r + 8 = 7r Reorder the terms: 8 + 3r = 7r Solving 8 + 3r = 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. 8 + 3r + -7r = 7r + -7r Combine like terms: 3r + -7r = -4r 8 + -4r = 7r + -7r Combine like terms: 7r + -7r = 0 8 + -4r = 0 Add '-8' to each side of the equation. 8 + -8 + -4r = 0 + -8 Combine like terms: 8 + -8 = 0 0 + -4r = 0 + -8 -4r = 0 + -8 Combine like terms: 0 + -8 = -8 -4r = -8 Divide each side by '-4'. r = 2 Simplifying r = 2
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