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Simplifying -55 = 21rx + -37 + -3x Reorder the terms: -55 = -37 + 21rx + -3x Solving -55 = -37 + 21rx + -3x Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-21rx' to each side of the equation. -55 + -21rx = -37 + 21rx + -21rx + -3x Combine like terms: 21rx + -21rx = 0 -55 + -21rx = -37 + 0 + -3x -55 + -21rx = -37 + -3x Add '55' to each side of the equation. -55 + 55 + -21rx = -37 + 55 + -3x Combine like terms: -55 + 55 = 0 0 + -21rx = -37 + 55 + -3x -21rx = -37 + 55 + -3x Combine like terms: -37 + 55 = 18 -21rx = 18 + -3x Divide each side by '-21x'. r = -0.8571428571x-1 + 0.1428571429 Simplifying r = -0.8571428571x-1 + 0.1428571429 Reorder the terms: r = 0.1428571429 + -0.8571428571x-1
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