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Simplifying -20r = 5(-3r + 8) + 5r Reorder the terms: -20r = 5(8 + -3r) + 5r -20r = (8 * 5 + -3r * 5) + 5r -20r = (40 + -15r) + 5r Combine like terms: -15r + 5r = -10r -20r = 40 + -10r Solving -20r = 40 + -10r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '10r' to each side of the equation. -20r + 10r = 40 + -10r + 10r Combine like terms: -20r + 10r = -10r -10r = 40 + -10r + 10r Combine like terms: -10r + 10r = 0 -10r = 40 + 0 -10r = 40 Divide each side by '-10'. r = -4 Simplifying r = -4
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