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