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Simplifying 3x = x + 3 + -3(x + -3) Reorder the terms: 3x = x + 3 + -3(-3 + x) 3x = x + 3 + (-3 * -3 + x * -3) 3x = x + 3 + (9 + -3x) Reorder the terms: 3x = 3 + 9 + x + -3x Combine like terms: 3 + 9 = 12 3x = 12 + x + -3x Combine like terms: x + -3x = -2x 3x = 12 + -2x Solving 3x = 12 + -2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2x' to each side of the equation. 3x + 2x = 12 + -2x + 2x Combine like terms: 3x + 2x = 5x 5x = 12 + -2x + 2x Combine like terms: -2x + 2x = 0 5x = 12 + 0 5x = 12 Divide each side by '5'. x = 2.4 Simplifying x = 2.4
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