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Simplifying -4(6r + 5) + -6r = 220 Reorder the terms: -4(5 + 6r) + -6r = 220 (5 * -4 + 6r * -4) + -6r = 220 (-20 + -24r) + -6r = 220 Combine like terms: -24r + -6r = -30r -20 + -30r = 220 Solving -20 + -30r = 220 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -30r = 220 + 20 Combine like terms: -20 + 20 = 0 0 + -30r = 220 + 20 -30r = 220 + 20 Combine like terms: 220 + 20 = 240 -30r = 240 Divide each side by '-30'. r = -8 Simplifying r = -8
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