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Simplifying -8 = 2(r + -4) Reorder the terms: -8 = 2(-4 + r) -8 = (-4 * 2 + r * 2) -8 = (-8 + 2r) Add '8' to each side of the equation. -8 + 8 = -8 + 8 + 2r Combine like terms: -8 + 8 = 0 0 = -8 + 8 + 2r Combine like terms: -8 + 8 = 0 0 = 0 + 2r 0 = 2r Solving 0 = 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. 0 + -2r = 2r + -2r Remove the zero: -2r = 2r + -2r Combine like terms: 2r + -2r = 0 -2r = 0 Divide each side by '-2'. r = 0 Simplifying r = 0
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