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Simplifying -7x + 2[-3x + -10] = 45 Reorder the terms: -7x + 2[-10 + -3x] = 45 -7x + [-10 * 2 + -3x * 2] = 45 -7x + [-20 + -6x] = 45 Reorder the terms: -20 + -7x + -6x = 45 Combine like terms: -7x + -6x = -13x -20 + -13x = 45 Solving -20 + -13x = 45 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + -13x = 45 + 20 Combine like terms: -20 + 20 = 0 0 + -13x = 45 + 20 -13x = 45 + 20 Combine like terms: 45 + 20 = 65 -13x = 65 Divide each side by '-13'. x = -5 Simplifying x = -5
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