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Simplifying 5x2 + 21y2 = 20 Solving 5x2 + 21y2 = 20 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-21y2' to each side of the equation. 5x2 + 21y2 + -21y2 = 20 + -21y2 Combine like terms: 21y2 + -21y2 = 0 5x2 + 0 = 20 + -21y2 5x2 = 20 + -21y2 Divide each side by '5'. x2 = 4 + -4.2y2 Simplifying x2 = 4 + -4.2y2 Reorder the terms: -4 + x2 + 4.2y2 = 4 + -4.2y2 + -4 + 4.2y2 Reorder the terms: -4 + x2 + 4.2y2 = 4 + -4 + -4.2y2 + 4.2y2 Combine like terms: 4 + -4 = 0 -4 + x2 + 4.2y2 = 0 + -4.2y2 + 4.2y2 -4 + x2 + 4.2y2 = -4.2y2 + 4.2y2 Combine like terms: -4.2y2 + 4.2y2 = 0.0 -4 + x2 + 4.2y2 = 0.0 The solution to this equation could not be determined.
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