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Simplifying -9 + 8(7x + 2) = 511 Reorder the terms: -9 + 8(2 + 7x) = 511 -9 + (2 * 8 + 7x * 8) = 511 -9 + (16 + 56x) = 511 Combine like terms: -9 + 16 = 7 7 + 56x = 511 Solving 7 + 56x = 511 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 56x = 511 + -7 Combine like terms: 7 + -7 = 0 0 + 56x = 511 + -7 56x = 511 + -7 Combine like terms: 511 + -7 = 504 56x = 504 Divide each side by '56'. x = 9 Simplifying x = 9
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