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Simplifying 12 + 6r = -4 + 2r Solving 12 + 6r = -4 + 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 + 6r + -2r = -4 + 2r + -2r Combine like terms: 6r + -2r = 4r 12 + 4r = -4 + 2r + -2r Combine like terms: 2r + -2r = 0 12 + 4r = -4 + 0 12 + 4r = -4 Add '-12' to each side of the equation. 12 + -12 + 4r = -4 + -12 Combine like terms: 12 + -12 = 0 0 + 4r = -4 + -12 4r = -4 + -12 Combine like terms: -4 + -12 = -16 4r = -16 Divide each side by '4'. r = -4 Simplifying r = -4
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