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