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Simplifying 4r + 9 = 8x + -13 Reorder the terms: 9 + 4r = 8x + -13 Reorder the terms: 9 + 4r = -13 + 8x Solving 9 + 4r = -13 + 8x Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + 4r = -13 + -9 + 8x Combine like terms: 9 + -9 = 0 0 + 4r = -13 + -9 + 8x 4r = -13 + -9 + 8x Combine like terms: -13 + -9 = -22 4r = -22 + 8x Divide each side by '4'. r = -5.5 + 2x Simplifying r = -5.5 + 2x
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