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Simplifying 5r + -4 = -12 + r Reorder the terms: -4 + 5r = -12 + r Solving -4 + 5r = -12 + r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-1r' to each side of the equation. -4 + 5r + -1r = -12 + r + -1r Combine like terms: 5r + -1r = 4r -4 + 4r = -12 + r + -1r Combine like terms: r + -1r = 0 -4 + 4r = -12 + 0 -4 + 4r = -12 Add '4' to each side of the equation. -4 + 4 + 4r = -12 + 4 Combine like terms: -4 + 4 = 0 0 + 4r = -12 + 4 4r = -12 + 4 Combine like terms: -12 + 4 = -8 4r = -8 Divide each side by '4'. r = -2 Simplifying r = -2
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