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Simplifying -2[7r + 4] + -14 = 20 Reorder the terms: -2[4 + 7r] + -14 = 20 [4 * -2 + 7r * -2] + -14 = 20 [-8 + -14r] + -14 = 20 Reorder the terms: -8 + -14 + -14r = 20 Combine like terms: -8 + -14 = -22 -22 + -14r = 20 Solving -22 + -14r = 20 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '22' to each side of the equation. -22 + 22 + -14r = 20 + 22 Combine like terms: -22 + 22 = 0 0 + -14r = 20 + 22 -14r = 20 + 22 Combine like terms: 20 + 22 = 42 -14r = 42 Divide each side by '-14'. r = -3 Simplifying r = -3
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