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Simplifying 12x + 9 = 4x + 7 Reorder the terms: 9 + 12x = 4x + 7 Reorder the terms: 9 + 12x = 7 + 4x Solving 9 + 12x = 7 + 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. 9 + 12x + -4x = 7 + 4x + -4x Combine like terms: 12x + -4x = 8x 9 + 8x = 7 + 4x + -4x Combine like terms: 4x + -4x = 0 9 + 8x = 7 + 0 9 + 8x = 7 Add '-9' to each side of the equation. 9 + -9 + 8x = 7 + -9 Combine like terms: 9 + -9 = 0 0 + 8x = 7 + -9 8x = 7 + -9 Combine like terms: 7 + -9 = -2 8x = -2 Divide each side by '8'. x = -0.25 Simplifying x = -0.25
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