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Simplifying 2x + -3(5x + -9) = -77 Reorder the terms: 2x + -3(-9 + 5x) = -77 2x + (-9 * -3 + 5x * -3) = -77 2x + (27 + -15x) = -77 Reorder the terms: 27 + 2x + -15x = -77 Combine like terms: 2x + -15x = -13x 27 + -13x = -77 Solving 27 + -13x = -77 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-27' to each side of the equation. 27 + -27 + -13x = -77 + -27 Combine like terms: 27 + -27 = 0 0 + -13x = -77 + -27 -13x = -77 + -27 Combine like terms: -77 + -27 = -104 -13x = -104 Divide each side by '-13'. x = 8 Simplifying x = 8
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