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Simplifying -4(7r + -5) = 20 + 6r Reorder the terms: -4(-5 + 7r) = 20 + 6r (-5 * -4 + 7r * -4) = 20 + 6r (20 + -28r) = 20 + 6r Add '-20' to each side of the equation. 20 + -20 + -28r = 20 + -20 + 6r Combine like terms: 20 + -20 = 0 0 + -28r = 20 + -20 + 6r -28r = 20 + -20 + 6r Combine like terms: 20 + -20 = 0 -28r = 0 + 6r -28r = 6r Solving -28r = 6r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-6r' to each side of the equation. -28r + -6r = 6r + -6r Combine like terms: -28r + -6r = -34r -34r = 6r + -6r Combine like terms: 6r + -6r = 0 -34r = 0 Divide each side by '-34'. r = 0 Simplifying r = 0
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