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Simplifying x2 + 4x + 4 + -1x2 = 56 Reorder the terms: 4 + 4x + x2 + -1x2 = 56 Combine like terms: x2 + -1x2 = 0 4 + 4x + 0 = 56 4 + 4x = 56 Solving 4 + 4x = 56 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + 4x = 56 + -4 Combine like terms: 4 + -4 = 0 0 + 4x = 56 + -4 4x = 56 + -4 Combine like terms: 56 + -4 = 52 4x = 52 Divide each side by '4'. x = 13 Simplifying x = 13
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