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Simplifying x(x + -3) = x2 + 7x + 3 Reorder the terms: x(-3 + x) = x2 + 7x + 3 (-3 * x + x * x) = x2 + 7x + 3 (-3x + x2) = x2 + 7x + 3 Reorder the terms: -3x + x2 = 3 + 7x + x2 Add '-1x2' to each side of the equation. -3x + x2 + -1x2 = 3 + 7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -3x + 0 = 3 + 7x + x2 + -1x2 -3x = 3 + 7x + x2 + -1x2 Combine like terms: x2 + -1x2 = 0 -3x = 3 + 7x + 0 -3x = 3 + 7x Solving -3x = 3 + 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. -3x + -7x = 3 + 7x + -7x Combine like terms: -3x + -7x = -10x -10x = 3 + 7x + -7x Combine like terms: 7x + -7x = 0 -10x = 3 + 0 -10x = 3 Divide each side by '-10'. x = -0.3 Simplifying x = -0.3
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