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Simplifying 15r + -9 = 4r + 2 Reorder the terms: -9 + 15r = 4r + 2 Reorder the terms: -9 + 15r = 2 + 4r Solving -9 + 15r = 2 + 4r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '-4r' to each side of the equation. -9 + 15r + -4r = 2 + 4r + -4r Combine like terms: 15r + -4r = 11r -9 + 11r = 2 + 4r + -4r Combine like terms: 4r + -4r = 0 -9 + 11r = 2 + 0 -9 + 11r = 2 Add '9' to each side of the equation. -9 + 9 + 11r = 2 + 9 Combine like terms: -9 + 9 = 0 0 + 11r = 2 + 9 11r = 2 + 9 Combine like terms: 2 + 9 = 11 11r = 11 Divide each side by '11'. r = 1 Simplifying r = 1
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