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Simplifying -4(r + 2) = -4(2 + -4r) Reorder the terms: -4(2 + r) = -4(2 + -4r) (2 * -4 + r * -4) = -4(2 + -4r) (-8 + -4r) = -4(2 + -4r) -8 + -4r = (2 * -4 + -4r * -4) -8 + -4r = (-8 + 16r) Add '8' to each side of the equation. -8 + 8 + -4r = -8 + 8 + 16r Combine like terms: -8 + 8 = 0 0 + -4r = -8 + 8 + 16r -4r = -8 + 8 + 16r Combine like terms: -8 + 8 = 0 -4r = 0 + 16r -4r = 16r Solving -4r = 16r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-16r' to each side of the equation. -4r + -16r = 16r + -16r Combine like terms: -4r + -16r = -20r -20r = 16r + -16r Combine like terms: 16r + -16r = 0 -20r = 0 Divide each side by '-20'. r = 0.0 Simplifying r = 0.0
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