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Simplifying 31 + -9x = -12x Solving 31 + -9x = -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. 31 + -9x + 12x = -12x + 12x Combine like terms: -9x + 12x = 3x 31 + 3x = -12x + 12x Combine like terms: -12x + 12x = 0 31 + 3x = 0 Add '-31' to each side of the equation. 31 + -31 + 3x = 0 + -31 Combine like terms: 31 + -31 = 0 0 + 3x = 0 + -31 3x = 0 + -31 Combine like terms: 0 + -31 = -31 3x = -31 Divide each side by '3'. x = -10.33333333 Simplifying x = -10.33333333
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