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Simplifying 2x + -1 = -3(x + 7) Reorder the terms: -1 + 2x = -3(x + 7) Reorder the terms: -1 + 2x = -3(7 + x) -1 + 2x = (7 * -3 + x * -3) -1 + 2x = (-21 + -3x) Solving -1 + 2x = -21 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. -1 + 2x + 3x = -21 + -3x + 3x Combine like terms: 2x + 3x = 5x -1 + 5x = -21 + -3x + 3x Combine like terms: -3x + 3x = 0 -1 + 5x = -21 + 0 -1 + 5x = -21 Add '1' to each side of the equation. -1 + 1 + 5x = -21 + 1 Combine like terms: -1 + 1 = 0 0 + 5x = -21 + 1 5x = -21 + 1 Combine like terms: -21 + 1 = -20 5x = -20 Divide each side by '5'. x = -4 Simplifying x = -4
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