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Simplifying -3(-2 + x) + -4x + 15 = -1 (-2 * -3 + x * -3) + -4x + 15 = -1 (6 + -3x) + -4x + 15 = -1 Reorder the terms: 6 + 15 + -3x + -4x = -1 Combine like terms: 6 + 15 = 21 21 + -3x + -4x = -1 Combine like terms: -3x + -4x = -7x 21 + -7x = -1 Solving 21 + -7x = -1 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 + -7x = -1 + -21 Combine like terms: 21 + -21 = 0 0 + -7x = -1 + -21 -7x = -1 + -21 Combine like terms: -1 + -21 = -22 -7x = -22 Divide each side by '-7'. x = 3.142857143 Simplifying x = 3.142857143
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