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Simplifying 4r + 3(r + -3) = 0 Reorder the terms: 4r + 3(-3 + r) = 0 4r + (-3 * 3 + r * 3) = 0 4r + (-9 + 3r) = 0 Reorder the terms: -9 + 4r + 3r = 0 Combine like terms: 4r + 3r = 7r -9 + 7r = 0 Solving -9 + 7r = 0 Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 7r = 0 + 9 Combine like terms: -9 + 9 = 0 0 + 7r = 0 + 9 7r = 0 + 9 Combine like terms: 0 + 9 = 9 7r = 9 Divide each side by '7'. r = 1.285714286 Simplifying r = 1.285714286
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