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Simplifying -189 + 12x = -2x + 399 Reorder the terms: -189 + 12x = 399 + -2x Solving -189 + 12x = 399 + -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. -189 + 12x + 2x = 399 + -2x + 2x Combine like terms: 12x + 2x = 14x -189 + 14x = 399 + -2x + 2x Combine like terms: -2x + 2x = 0 -189 + 14x = 399 + 0 -189 + 14x = 399 Add '189' to each side of the equation. -189 + 189 + 14x = 399 + 189 Combine like terms: -189 + 189 = 0 0 + 14x = 399 + 189 14x = 399 + 189 Combine like terms: 399 + 189 = 588 14x = 588 Divide each side by '14'. x = 42 Simplifying x = 42
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