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Simplifying r + 19 = 4 + -2r Reorder the terms: 19 + r = 4 + -2r Solving 19 + r = 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. 19 + r + 2r = 4 + -2r + 2r Combine like terms: r + 2r = 3r 19 + 3r = 4 + -2r + 2r Combine like terms: -2r + 2r = 0 19 + 3r = 4 + 0 19 + 3r = 4 Add '-19' to each side of the equation. 19 + -19 + 3r = 4 + -19 Combine like terms: 19 + -19 = 0 0 + 3r = 4 + -19 3r = 4 + -19 Combine like terms: 4 + -19 = -15 3r = -15 Divide each side by '3'. r = -5 Simplifying r = -5
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