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Simplifying -2x + 7(-2x + -3) = 171 Reorder the terms: -2x + 7(-3 + -2x) = 171 -2x + (-3 * 7 + -2x * 7) = 171 -2x + (-21 + -14x) = 171 Reorder the terms: -21 + -2x + -14x = 171 Combine like terms: -2x + -14x = -16x -21 + -16x = 171 Solving -21 + -16x = 171 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -16x = 171 + 21 Combine like terms: -21 + 21 = 0 0 + -16x = 171 + 21 -16x = 171 + 21 Combine like terms: 171 + 21 = 192 -16x = 192 Divide each side by '-16'. x = -12 Simplifying x = -12
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