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Simplifying 4r + -5(-5r + 6) = -204 Reorder the terms: 4r + -5(6 + -5r) = -204 4r + (6 * -5 + -5r * -5) = -204 4r + (-30 + 25r) = -204 Reorder the terms: -30 + 4r + 25r = -204 Combine like terms: 4r + 25r = 29r -30 + 29r = -204 Solving -30 + 29r = -204 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 29r = -204 + 30 Combine like terms: -30 + 30 = 0 0 + 29r = -204 + 30 29r = -204 + 30 Combine like terms: -204 + 30 = -174 29r = -174 Divide each side by '29'. r = -6 Simplifying r = -6
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