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Simplifying x2 + -4x = x(-7 + x) Reorder the terms: -4x + x2 = x(-7 + x) -4x + x2 = (-7 * x + x * x) -4x + x2 = (-7x + x2) Add '-1x2' to each side of the equation. -4x + x2 + -1x2 = -7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4x + 0 = -7x + x2 + -1x2 -4x = -7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -4x = -7x + 0 -4x = -7x Solving -4x = -7x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '7x' to each side of the equation. -4x + 7x = -7x + 7x Combine like terms: -4x + 7x = 3x 3x = -7x + 7x Combine like terms: -7x + 7x = 0 3x = 0 Divide each side by '3'. x = 0 Simplifying x = 0
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