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Simplifying r + -2 + -4r = -38 Reorder the terms: -2 + r + -4r = -38 Combine like terms: r + -4r = -3r -2 + -3r = -38 Solving -2 + -3r = -38 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + -3r = -38 + 2 Combine like terms: -2 + 2 = 0 0 + -3r = -38 + 2 -3r = -38 + 2 Combine like terms: -38 + 2 = -36 -3r = -36 Divide each side by '-3'. r = 12 Simplifying r = 12
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