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Simplifying 3(-3 + -8r) = -3r + -30 (-3 * 3 + -8r * 3) = -3r + -30 (-9 + -24r) = -3r + -30 Reorder the terms: -9 + -24r = -30 + -3r Solving -9 + -24r = -30 + -3r Solving for variable 'r'. Move all terms containing r to the left, all other terms to the right. Add '3r' to each side of the equation. -9 + -24r + 3r = -30 + -3r + 3r Combine like terms: -24r + 3r = -21r -9 + -21r = -30 + -3r + 3r Combine like terms: -3r + 3r = 0 -9 + -21r = -30 + 0 -9 + -21r = -30 Add '9' to each side of the equation. -9 + 9 + -21r = -30 + 9 Combine like terms: -9 + 9 = 0 0 + -21r = -30 + 9 -21r = -30 + 9 Combine like terms: -30 + 9 = -21 -21r = -21 Divide each side by '-21'. r = 1 Simplifying r = 1
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