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Simplifying -4(r + 3) = -51 Reorder the terms: -4(3 + r) = -51 (3 * -4 + r * -4) = -51 (-12 + -4r) = -51 Solving -12 + -4r = -51 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + -4r = -51 + 12 Combine like terms: -12 + 12 = 0 0 + -4r = -51 + 12 -4r = -51 + 12 Combine like terms: -51 + 12 = -39 -4r = -39 Divide each side by '-4'. r = 9.75 Simplifying r = 9.75
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