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Simplifying 3r + -4 = 17 Reorder the terms: -4 + 3r = 17 Solving -4 + 3r = 17 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + 3r = 17 + 4 Combine like terms: -4 + 4 = 0 0 + 3r = 17 + 4 3r = 17 + 4 Combine like terms: 17 + 4 = 21 3r = 21 Divide each side by '3'. r = 7 Simplifying r = 7
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