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Simplifying 4x + 2(3x + -9) = 42 Reorder the terms: 4x + 2(-9 + 3x) = 42 4x + (-9 * 2 + 3x * 2) = 42 4x + (-18 + 6x) = 42 Reorder the terms: -18 + 4x + 6x = 42 Combine like terms: 4x + 6x = 10x -18 + 10x = 42 Solving -18 + 10x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '18' to each side of the equation. -18 + 18 + 10x = 42 + 18 Combine like terms: -18 + 18 = 0 0 + 10x = 42 + 18 10x = 42 + 18 Combine like terms: 42 + 18 = 60 10x = 60 Divide each side by '10'. x = 6 Simplifying x = 6
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