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Simplifying -1r + 12 = 6r + -18 Reorder the terms: 12 + -1r = 6r + -18 Reorder the terms: 12 + -1r = -18 + 6r Solving 12 + -1r = -18 + 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. 12 + -1r + -6r = -18 + 6r + -6r Combine like terms: -1r + -6r = -7r 12 + -7r = -18 + 6r + -6r Combine like terms: 6r + -6r = 0 12 + -7r = -18 + 0 12 + -7r = -18 Add '-12' to each side of the equation. 12 + -12 + -7r = -18 + -12 Combine like terms: 12 + -12 = 0 0 + -7r = -18 + -12 -7r = -18 + -12 Combine like terms: -18 + -12 = -30 -7r = -30 Divide each side by '-7'. r = 4.285714286 Simplifying r = 4.285714286
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