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Simplifying -6x + -4(-2x + -7) = 40 Reorder the terms: -6x + -4(-7 + -2x) = 40 -6x + (-7 * -4 + -2x * -4) = 40 -6x + (28 + 8x) = 40 Reorder the terms: 28 + -6x + 8x = 40 Combine like terms: -6x + 8x = 2x 28 + 2x = 40 Solving 28 + 2x = 40 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-28' to each side of the equation. 28 + -28 + 2x = 40 + -28 Combine like terms: 28 + -28 = 0 0 + 2x = 40 + -28 2x = 40 + -28 Combine like terms: 40 + -28 = 12 2x = 12 Divide each side by '2'. x = 6 Simplifying x = 6
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