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Simplifying 3r + -12 = 2r Reorder the terms: -12 + 3r = 2r Solving -12 + 3r = 2r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-2r' to each side of the equation. -12 + 3r + -2r = 2r + -2r Combine like terms: 3r + -2r = 1r -12 + 1r = 2r + -2r Combine like terms: 2r + -2r = 0 -12 + 1r = 0 Add '12' to each side of the equation. -12 + 12 + 1r = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 1r = 0 + 12 1r = 0 + 12 Combine like terms: 0 + 12 = 12 1r = 12 Divide each side by '1'. r = 12 Simplifying r = 12
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