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Simplifying 2(3x + -4) + 3 = 21 Reorder the terms: 2(-4 + 3x) + 3 = 21 (-4 * 2 + 3x * 2) + 3 = 21 (-8 + 6x) + 3 = 21 Reorder the terms: -8 + 3 + 6x = 21 Combine like terms: -8 + 3 = -5 -5 + 6x = 21 Solving -5 + 6x = 21 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + 6x = 21 + 5 Combine like terms: -5 + 5 = 0 0 + 6x = 21 + 5 6x = 21 + 5 Combine like terms: 21 + 5 = 26 6x = 26 Divide each side by '6'. x = 4.333333333 Simplifying x = 4.333333333
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