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Simplifying -7(-3 + -1x) = -2(3 + -1x) (-3 * -7 + -1x * -7) = -2(3 + -1x) (21 + 7x) = -2(3 + -1x) 21 + 7x = (3 * -2 + -1x * -2) 21 + 7x = (-6 + 2x) Solving 21 + 7x = -6 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 21 + 7x + -2x = -6 + 2x + -2x Combine like terms: 7x + -2x = 5x 21 + 5x = -6 + 2x + -2x Combine like terms: 2x + -2x = 0 21 + 5x = -6 + 0 21 + 5x = -6 Add '-21' to each side of the equation. 21 + -21 + 5x = -6 + -21 Combine like terms: 21 + -21 = 0 0 + 5x = -6 + -21 5x = -6 + -21 Combine like terms: -6 + -21 = -27 5x = -27 Divide each side by '5'. x = -5.4 Simplifying x = -5.4
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