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Simplifying 4x + 9 = -3x + -12 Reorder the terms: 9 + 4x = -3x + -12 Reorder the terms: 9 + 4x = -12 + -3x Solving 9 + 4x = -12 + -3x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3x' to each side of the equation. 9 + 4x + 3x = -12 + -3x + 3x Combine like terms: 4x + 3x = 7x 9 + 7x = -12 + -3x + 3x Combine like terms: -3x + 3x = 0 9 + 7x = -12 + 0 9 + 7x = -12 Add '-9' to each side of the equation. 9 + -9 + 7x = -12 + -9 Combine like terms: 9 + -9 = 0 0 + 7x = -12 + -9 7x = -12 + -9 Combine like terms: -12 + -9 = -21 7x = -21 Divide each side by '7'. x = -3 Simplifying x = -3
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