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Simplifying 7(x + 8) = -21 Reorder the terms: 7(8 + x) = -21 (8 * 7 + x * 7) = -21 (56 + 7x) = -21 Solving 56 + 7x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-56' to each side of the equation. 56 + -56 + 7x = -21 + -56 Combine like terms: 56 + -56 = 0 0 + 7x = -21 + -56 7x = -21 + -56 Combine like terms: -21 + -56 = -77 7x = -77 Divide each side by '7'. x = -11 Simplifying x = -11
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