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Simplifying 21 = -5 + -12x Solving 21 = -5 + -12x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12x' to each side of the equation. 21 + 12x = -5 + -12x + 12x Combine like terms: -12x + 12x = 0 21 + 12x = -5 + 0 21 + 12x = -5 Add '-21' to each side of the equation. 21 + -21 + 12x = -5 + -21 Combine like terms: 21 + -21 = 0 0 + 12x = -5 + -21 12x = -5 + -21 Combine like terms: -5 + -21 = -26 12x = -26 Divide each side by '12'. x = -2.166666667 Simplifying x = -2.166666667
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