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Simplifying 4r + -2 = 18 + 9r Reorder the terms: -2 + 4r = 18 + 9r Solving -2 + 4r = 18 + 9r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9r' to each side of the equation. -2 + 4r + -9r = 18 + 9r + -9r Combine like terms: 4r + -9r = -5r -2 + -5r = 18 + 9r + -9r Combine like terms: 9r + -9r = 0 -2 + -5r = 18 + 0 -2 + -5r = 18 Add '2' to each side of the equation. -2 + 2 + -5r = 18 + 2 Combine like terms: -2 + 2 = 0 0 + -5r = 18 + 2 -5r = 18 + 2 Combine like terms: 18 + 2 = 20 -5r = 20 Divide each side by '-5'. r = -4 Simplifying r = -4
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