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Simplifying -2x + -5(-3x + -7) = -121 Reorder the terms: -2x + -5(-7 + -3x) = -121 -2x + (-7 * -5 + -3x * -5) = -121 -2x + (35 + 15x) = -121 Reorder the terms: 35 + -2x + 15x = -121 Combine like terms: -2x + 15x = 13x 35 + 13x = -121 Solving 35 + 13x = -121 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-35' to each side of the equation. 35 + -35 + 13x = -121 + -35 Combine like terms: 35 + -35 = 0 0 + 13x = -121 + -35 13x = -121 + -35 Combine like terms: -121 + -35 = -156 13x = -156 Divide each side by '13'. x = -12 Simplifying x = -12
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