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Simplifying 3(2x + 5) = (-21) Reorder the terms: 3(5 + 2x) = (-21) (5 * 3 + 2x * 3) = (-21) (15 + 6x) = (-21) 15 + 6x = -21 Solving 15 + 6x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-15' to each side of the equation. 15 + -15 + 6x = -21 + -15 Combine like terms: 15 + -15 = 0 0 + 6x = -21 + -15 6x = -21 + -15 Combine like terms: -21 + -15 = -36 6x = -36 Divide each side by '6'. x = -6 Simplifying x = -6
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