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Simplifying -4(r + 8) = -51 Reorder the terms: -4(8 + r) = -51 (8 * -4 + r * -4) = -51 (-32 + -4r) = -51 Solving -32 + -4r = -51 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '32' to each side of the equation. -32 + 32 + -4r = -51 + 32 Combine like terms: -32 + 32 = 0 0 + -4r = -51 + 32 -4r = -51 + 32 Combine like terms: -51 + 32 = -19 -4r = -19 Divide each side by '-4'. r = 4.75 Simplifying r = 4.75
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