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Simplifying -2 = 1 + -7r + 4 Reorder the terms: -2 = 1 + 4 + -7r Combine like terms: 1 + 4 = 5 -2 = 5 + -7r Solving -2 = 5 + -7r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '7r' to each side of the equation. -2 + 7r = 5 + -7r + 7r Combine like terms: -7r + 7r = 0 -2 + 7r = 5 + 0 -2 + 7r = 5 Add '2' to each side of the equation. -2 + 2 + 7r = 5 + 2 Combine like terms: -2 + 2 = 0 0 + 7r = 5 + 2 7r = 5 + 2 Combine like terms: 5 + 2 = 7 7r = 7 Divide each side by '7'. r = 1 Simplifying r = 1
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