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Simplifying 2x2 + 5ax2 + (-7x2) = 0 Reorder the terms: 5ax2 + 2x2 + (-7x2) = 0 Combine like terms: 2x2 + (-7x2) = -5x2 5ax2 + -5x2 = 0 Solving 5ax2 + -5x2 = 0 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '5x2' to each side of the equation. 5ax2 + -5x2 + 5x2 = 0 + 5x2 Combine like terms: -5x2 + 5x2 = 0 5ax2 + 0 = 0 + 5x2 5ax2 = 0 + 5x2 Remove the zero: 5ax2 = 5x2 Divide each side by '5x2'. a = 1 Simplifying a = 1
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