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Simplifying x + 21 = 43 + -12x Reorder the terms: 21 + x = 43 + -12x Solving 21 + x = 43 + -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 + x + 12x = 43 + -12x + 12x Combine like terms: x + 12x = 13x 21 + 13x = 43 + -12x + 12x Combine like terms: -12x + 12x = 0 21 + 13x = 43 + 0 21 + 13x = 43 Add '-21' to each side of the equation. 21 + -21 + 13x = 43 + -21 Combine like terms: 21 + -21 = 0 0 + 13x = 43 + -21 13x = 43 + -21 Combine like terms: 43 + -21 = 22 13x = 22 Divide each side by '13'. x = 1.692307692 Simplifying x = 1.692307692
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