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Simplifying 4r + -20 = -5 + 7r Reorder the terms: -20 + 4r = -5 + 7r Solving -20 + 4r = -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. -20 + 4r + -7r = -5 + 7r + -7r Combine like terms: 4r + -7r = -3r -20 + -3r = -5 + 7r + -7r Combine like terms: 7r + -7r = 0 -20 + -3r = -5 + 0 -20 + -3r = -5 Add '20' to each side of the equation. -20 + 20 + -3r = -5 + 20 Combine like terms: -20 + 20 = 0 0 + -3r = -5 + 20 -3r = -5 + 20 Combine like terms: -5 + 20 = 15 -3r = 15 Divide each side by '-3'. r = -5 Simplifying r = -5
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