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Simplifying 7 + 4r = 7r + -8 Reorder the terms: 7 + 4r = -8 + 7r Solving 7 + 4r = -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. 7 + 4r + -7r = -8 + 7r + -7r Combine like terms: 4r + -7r = -3r 7 + -3r = -8 + 7r + -7r Combine like terms: 7r + -7r = 0 7 + -3r = -8 + 0 7 + -3r = -8 Add '-7' to each side of the equation. 7 + -7 + -3r = -8 + -7 Combine like terms: 7 + -7 = 0 0 + -3r = -8 + -7 -3r = -8 + -7 Combine like terms: -8 + -7 = -15 -3r = -15 Divide each side by '-3'. r = 5 Simplifying r = 5
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