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Simplifying 3(2x + -4) + 3x = 20 Reorder the terms: 3(-4 + 2x) + 3x = 20 (-4 * 3 + 2x * 3) + 3x = 20 (-12 + 6x) + 3x = 20 Combine like terms: 6x + 3x = 9x -12 + 9x = 20 Solving -12 + 9x = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '12' to each side of the equation. -12 + 12 + 9x = 20 + 12 Combine like terms: -12 + 12 = 0 0 + 9x = 20 + 12 9x = 20 + 12 Combine like terms: 20 + 12 = 32 9x = 32 Divide each side by '9'. x = 3.555555556 Simplifying x = 3.555555556
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