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Simplifying 21x = 2(x + -3) Reorder the terms: 21x = 2(-3 + x) 21x = (-3 * 2 + x * 2) 21x = (-6 + 2x) Solving 21x = -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. 21x + -2x = -6 + 2x + -2x Combine like terms: 21x + -2x = 19x 19x = -6 + 2x + -2x Combine like terms: 2x + -2x = 0 19x = -6 + 0 19x = -6 Divide each side by '19'. x = -0.3157894737 Simplifying x = -0.3157894737
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