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Simplifying 3x + 2(2x + -4) = 13 Reorder the terms: 3x + 2(-4 + 2x) = 13 3x + (-4 * 2 + 2x * 2) = 13 3x + (-8 + 4x) = 13 Reorder the terms: -8 + 3x + 4x = 13 Combine like terms: 3x + 4x = 7x -8 + 7x = 13 Solving -8 + 7x = 13 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '8' to each side of the equation. -8 + 8 + 7x = 13 + 8 Combine like terms: -8 + 8 = 0 0 + 7x = 13 + 8 7x = 13 + 8 Combine like terms: 13 + 8 = 21 7x = 21 Divide each side by '7'. x = 3 Simplifying x = 3
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