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Simplifying 8r + -18 = -4 + r Reorder the terms: -18 + 8r = -4 + r Solving -18 + 8r = -4 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -18 + 8r + -1r = -4 + r + -1r Combine like terms: 8r + -1r = 7r -18 + 7r = -4 + r + -1r Combine like terms: r + -1r = 0 -18 + 7r = -4 + 0 -18 + 7r = -4 Add '18' to each side of the equation. -18 + 18 + 7r = -4 + 18 Combine like terms: -18 + 18 = 0 0 + 7r = -4 + 18 7r = -4 + 18 Combine like terms: -4 + 18 = 14 7r = 14 Divide each side by '7'. r = 2 Simplifying r = 2
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