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Simplifying -2x + 7(-4x + 7) = -161 Reorder the terms: -2x + 7(7 + -4x) = -161 -2x + (7 * 7 + -4x * 7) = -161 -2x + (49 + -28x) = -161 Reorder the terms: 49 + -2x + -28x = -161 Combine like terms: -2x + -28x = -30x 49 + -30x = -161 Solving 49 + -30x = -161 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-49' to each side of the equation. 49 + -49 + -30x = -161 + -49 Combine like terms: 49 + -49 = 0 0 + -30x = -161 + -49 -30x = -161 + -49 Combine like terms: -161 + -49 = -210 -30x = -210 Divide each side by '-30'. x = 7 Simplifying x = 7
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