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Simplifying 3(r + -4) = -4 Reorder the terms: 3(-4 + r) = -4 (-4 * 3 + r * 3) = -4 (-12 + 3r) = -4 Solving -12 + 3r = -4 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 = -4 + 12 Combine like terms: -12 + 12 = 0 0 + 3r = -4 + 12 3r = -4 + 12 Combine like terms: -4 + 12 = 8 3r = 8 Divide each side by '3'. r = 2.666666667 Simplifying r = 2.666666667
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