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Simplifying 7 = 1 + -2r Solving 7 = 1 + -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. 7 + 2r = 1 + -2r + 2r Combine like terms: -2r + 2r = 0 7 + 2r = 1 + 0 7 + 2r = 1 Add '-7' to each side of the equation. 7 + -7 + 2r = 1 + -7 Combine like terms: 7 + -7 = 0 0 + 2r = 1 + -7 2r = 1 + -7 Combine like terms: 1 + -7 = -6 2r = -6 Divide each side by '2'. r = -3 Simplifying r = -3
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