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Simplifying -3(r + 4) = -55 Reorder the terms: -3(4 + r) = -55 (4 * -3 + r * -3) = -55 (-12 + -3r) = -55 Solving -12 + -3r = -55 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 + -3r = -55 + 12 Combine like terms: -12 + 12 = 0 0 + -3r = -55 + 12 -3r = -55 + 12 Combine like terms: -55 + 12 = -43 -3r = -43 Divide each side by '-3'. r = 14.33333333 Simplifying r = 14.33333333
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