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Simplifying 9r + -54 = 3r + 12 Reorder the terms: -54 + 9r = 3r + 12 Reorder the terms: -54 + 9r = 12 + 3r Solving -54 + 9r = 12 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. -54 + 9r + -3r = 12 + 3r + -3r Combine like terms: 9r + -3r = 6r -54 + 6r = 12 + 3r + -3r Combine like terms: 3r + -3r = 0 -54 + 6r = 12 + 0 -54 + 6r = 12 Add '54' to each side of the equation. -54 + 54 + 6r = 12 + 54 Combine like terms: -54 + 54 = 0 0 + 6r = 12 + 54 6r = 12 + 54 Combine like terms: 12 + 54 = 66 6r = 66 Divide each side by '6'. r = 11 Simplifying r = 11
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