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Simplifying 5x * -8x + -21 = 0 Reorder the terms for easier multiplication: 5 * -8x * x + -21 = 0 Multiply 5 * -8 -40x * x + -21 = 0 Multiply x * x -40x2 + -21 = 0 Reorder the terms: -21 + -40x2 = 0 Solving -21 + -40x2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + -40x2 = 0 + 21 Combine like terms: -21 + 21 = 0 0 + -40x2 = 0 + 21 -40x2 = 0 + 21 Combine like terms: 0 + 21 = 21 -40x2 = 21 Divide each side by '-40'. x2 = -0.525 Simplifying x2 = -0.525 Reorder the terms: 0.525 + x2 = -0.525 + 0.525 Combine like terms: -0.525 + 0.525 = 0.000 0.525 + x2 = 0.000 The solution to this equation could not be determined.
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