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Simplifying -4(r + -3) = -16 Reorder the terms: -4(-3 + r) = -16 (-3 * -4 + r * -4) = -16 (12 + -4r) = -16 Solving 12 + -4r = -16 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 = -16 + -12 Combine like terms: 12 + -12 = 0 0 + -4r = -16 + -12 -4r = -16 + -12 Combine like terms: -16 + -12 = -28 -4r = -28 Divide each side by '-4'. r = 7 Simplifying r = 7
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