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Simplifying 12 + -2r = -5r Solving 12 + -2r = -5r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '5r' to each side of the equation. 12 + -2r + 5r = -5r + 5r Combine like terms: -2r + 5r = 3r 12 + 3r = -5r + 5r Combine like terms: -5r + 5r = 0 12 + 3r = 0 Add '-12' to each side of the equation. 12 + -12 + 3r = 0 + -12 Combine like terms: 12 + -12 = 0 0 + 3r = 0 + -12 3r = 0 + -12 Combine like terms: 0 + -12 = -12 3r = -12 Divide each side by '3'. r = -4 Simplifying r = -4
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