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Simplifying 3r + -4 = 16 + -7r Reorder the terms: -4 + 3r = 16 + -7r Solving -4 + 3r = 16 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. -4 + 3r + 7r = 16 + -7r + 7r Combine like terms: 3r + 7r = 10r -4 + 10r = 16 + -7r + 7r Combine like terms: -7r + 7r = 0 -4 + 10r = 16 + 0 -4 + 10r = 16 Add '4' to each side of the equation. -4 + 4 + 10r = 16 + 4 Combine like terms: -4 + 4 = 0 0 + 10r = 16 + 4 10r = 16 + 4 Combine like terms: 16 + 4 = 20 10r = 20 Divide each side by '10'. r = 2 Simplifying r = 2
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