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Simplifying 6x + 7 = -21 + -8x Reorder the terms: 7 + 6x = -21 + -8x Solving 7 + 6x = -21 + -8x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8x' to each side of the equation. 7 + 6x + 8x = -21 + -8x + 8x Combine like terms: 6x + 8x = 14x 7 + 14x = -21 + -8x + 8x Combine like terms: -8x + 8x = 0 7 + 14x = -21 + 0 7 + 14x = -21 Add '-7' to each side of the equation. 7 + -7 + 14x = -21 + -7 Combine like terms: 7 + -7 = 0 0 + 14x = -21 + -7 14x = -21 + -7 Combine like terms: -21 + -7 = -28 14x = -28 Divide each side by '14'. x = -2 Simplifying x = -2
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