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Simplifying 3r = (7r + -8) Reorder the terms: 3r = (-8 + 7r) Remove parenthesis around (-8 + 7r) 3r = -8 + 7r Solving 3r = -8 + 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. 3r + -7r = -8 + 7r + -7r Combine like terms: 3r + -7r = -4r -4r = -8 + 7r + -7r Combine like terms: 7r + -7r = 0 -4r = -8 + 0 -4r = -8 Divide each side by '-4'. r = 2 Simplifying r = 2
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