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Simplifying 12 + -1(-9) * x = 8 + -4x Multiply -1 * -9 12 + 9x = 8 + -4x Solving 12 + 9x = 8 + -4x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '4x' to each side of the equation. 12 + 9x + 4x = 8 + -4x + 4x Combine like terms: 9x + 4x = 13x 12 + 13x = 8 + -4x + 4x Combine like terms: -4x + 4x = 0 12 + 13x = 8 + 0 12 + 13x = 8 Add '-12' to each side of the equation. 12 + -12 + 13x = 8 + -12 Combine like terms: 12 + -12 = 0 0 + 13x = 8 + -12 13x = 8 + -12 Combine like terms: 8 + -12 = -4 13x = -4 Divide each side by '13'. x = -0.3076923077 Simplifying x = -0.3076923077
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