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Simplifying 45 = -2r + 5 Reorder the terms: 45 = 5 + -2r Solving 45 = 5 + -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. 45 + 2r = 5 + -2r + 2r Combine like terms: -2r + 2r = 0 45 + 2r = 5 + 0 45 + 2r = 5 Add '-45' to each side of the equation. 45 + -45 + 2r = 5 + -45 Combine like terms: 45 + -45 = 0 0 + 2r = 5 + -45 2r = 5 + -45 Combine like terms: 5 + -45 = -40 2r = -40 Divide each side by '2'. r = -20 Simplifying r = -20
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