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Simplifying 8r + -3 + 4r = -19 Reorder the terms: -3 + 8r + 4r = -19 Combine like terms: 8r + 4r = 12r -3 + 12r = -19 Solving -3 + 12r = -19 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 12r = -19 + 3 Combine like terms: -3 + 3 = 0 0 + 12r = -19 + 3 12r = -19 + 3 Combine like terms: -19 + 3 = -16 12r = -16 Divide each side by '12'. r = -1.333333333 Simplifying r = -1.333333333
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