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Simplifying r + 1 + 3 = 16 + 3r + 2 + -6 Reorder the terms: 1 + 3 + r = 16 + 3r + 2 + -6 Combine like terms: 1 + 3 = 4 4 + r = 16 + 3r + 2 + -6 Reorder the terms: 4 + r = 16 + 2 + -6 + 3r Combine like terms: 16 + 2 = 18 4 + r = 18 + -6 + 3r Combine like terms: 18 + -6 = 12 4 + r = 12 + 3r Solving 4 + r = 12 + 3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-3r' to each side of the equation. 4 + r + -3r = 12 + 3r + -3r Combine like terms: r + -3r = -2r 4 + -2r = 12 + 3r + -3r Combine like terms: 3r + -3r = 0 4 + -2r = 12 + 0 4 + -2r = 12 Add '-4' to each side of the equation. 4 + -4 + -2r = 12 + -4 Combine like terms: 4 + -4 = 0 0 + -2r = 12 + -4 -2r = 12 + -4 Combine like terms: 12 + -4 = 8 -2r = 8 Divide each side by '-2'. r = -4 Simplifying r = -4
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