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Simplifying x2 + -7x = x(2 + x) Reorder the terms: -7x + x2 = x(2 + x) -7x + x2 = (2 * x + x * x) -7x + x2 = (2x + x2) Add '-1x2' to each side of the equation. -7x + x2 + -1x2 = 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -7x + 0 = 2x + x2 + -1x2 -7x = 2x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -7x = 2x + 0 -7x = 2x Solving -7x = 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. -7x + -2x = 2x + -2x Combine like terms: -7x + -2x = -9x -9x = 2x + -2x Combine like terms: 2x + -2x = 0 -9x = 0 Divide each side by '-9'. x = 0 Simplifying x = 0
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