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Simplifying 2x + 2(2x + -15) = 42 Reorder the terms: 2x + 2(-15 + 2x) = 42 2x + (-15 * 2 + 2x * 2) = 42 2x + (-30 + 4x) = 42 Reorder the terms: -30 + 2x + 4x = 42 Combine like terms: 2x + 4x = 6x -30 + 6x = 42 Solving -30 + 6x = 42 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '30' to each side of the equation. -30 + 30 + 6x = 42 + 30 Combine like terms: -30 + 30 = 0 0 + 6x = 42 + 30 6x = 42 + 30 Combine like terms: 42 + 30 = 72 6x = 72 Divide each side by '6'. x = 12 Simplifying x = 12
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