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Simplifying 8x + 6 + 5x = -21 Reorder the terms: 6 + 8x + 5x = -21 Combine like terms: 8x + 5x = 13x 6 + 13x = -21 Solving 6 + 13x = -21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-6' to each side of the equation. 6 + -6 + 13x = -21 + -6 Combine like terms: 6 + -6 = 0 0 + 13x = -21 + -6 13x = -21 + -6 Combine like terms: -21 + -6 = -27 13x = -27 Divide each side by '13'. x = -2.076923077 Simplifying x = -2.076923077
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