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Simplifying 8r + 7 = 18r + 12 Reorder the terms: 7 + 8r = 18r + 12 Reorder the terms: 7 + 8r = 12 + 18r Solving 7 + 8r = 12 + 18r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-18r' to each side of the equation. 7 + 8r + -18r = 12 + 18r + -18r Combine like terms: 8r + -18r = -10r 7 + -10r = 12 + 18r + -18r Combine like terms: 18r + -18r = 0 7 + -10r = 12 + 0 7 + -10r = 12 Add '-7' to each side of the equation. 7 + -7 + -10r = 12 + -7 Combine like terms: 7 + -7 = 0 0 + -10r = 12 + -7 -10r = 12 + -7 Combine like terms: 12 + -7 = 5 -10r = 5 Divide each side by '-10'. r = -0.5 Simplifying r = -0.5
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