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Simplifying -7x + 7(-2x + 4) = 154 Reorder the terms: -7x + 7(4 + -2x) = 154 -7x + (4 * 7 + -2x * 7) = 154 -7x + (28 + -14x) = 154 Reorder the terms: 28 + -7x + -14x = 154 Combine like terms: -7x + -14x = -21x 28 + -21x = 154 Solving 28 + -21x = 154 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 + -21x = 154 + -28 Combine like terms: 28 + -28 = 0 0 + -21x = 154 + -28 -21x = 154 + -28 Combine like terms: 154 + -28 = 126 -21x = 126 Divide each side by '-21'. x = -6 Simplifying x = -6
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