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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 = 16 8x = 16 Divide each side by '8'. x = 2 Simplifying x = 2
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