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Simplifying -7(-4 + 4r) = 2r + 28 (-4 * -7 + 4r * -7) = 2r + 28 (28 + -28r) = 2r + 28 Reorder the terms: 28 + -28r = 28 + 2r Add '-28' to each side of the equation. 28 + -28 + -28r = 28 + -28 + 2r Combine like terms: 28 + -28 = 0 0 + -28r = 28 + -28 + 2r -28r = 28 + -28 + 2r Combine like terms: 28 + -28 = 0 -28r = 0 + 2r -28r = 2r Solving -28r = 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -28r + -2r = 2r + -2r Combine like terms: -28r + -2r = -30r -30r = 2r + -2r Combine like terms: 2r + -2r = 0 -30r = 0 Divide each side by '-30'. r = 0.0 Simplifying r = 0.0
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