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Simplifying 7r + -4r + 2 = r + -4 Reorder the terms: 2 + 7r + -4r = r + -4 Combine like terms: 7r + -4r = 3r 2 + 3r = r + -4 Reorder the terms: 2 + 3r = -4 + r Solving 2 + 3r = -4 + 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. 2 + 3r + -1r = -4 + r + -1r Combine like terms: 3r + -1r = 2r 2 + 2r = -4 + r + -1r Combine like terms: r + -1r = 0 2 + 2r = -4 + 0 2 + 2r = -4 Add '-2' to each side of the equation. 2 + -2 + 2r = -4 + -2 Combine like terms: 2 + -2 = 0 0 + 2r = -4 + -2 2r = -4 + -2 Combine like terms: -4 + -2 = -6 2r = -6 Divide each side by '2'. r = -3 Simplifying r = -3
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