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Simplifying 4r + -5 = 15 + 2r Reorder the terms: -5 + 4r = 15 + 2r Solving -5 + 4r = 15 + 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. -5 + 4r + -2r = 15 + 2r + -2r Combine like terms: 4r + -2r = 2r -5 + 2r = 15 + 2r + -2r Combine like terms: 2r + -2r = 0 -5 + 2r = 15 + 0 -5 + 2r = 15 Add '5' to each side of the equation. -5 + 5 + 2r = 15 + 5 Combine like terms: -5 + 5 = 0 0 + 2r = 15 + 5 2r = 15 + 5 Combine like terms: 15 + 5 = 20 2r = 20 Divide each side by '2'. r = 10 Simplifying r = 10
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