Which equation can be solved by using this system of equations? y = 3x^3 - 7x^2 + 5 y = 7x^4 + 2x A.) 3x^3 - 7x^2 +5 = 0 B.) 3x^3 - 7x^2 + 5 = 7x^4 +2x C.) 7x^4 +2x = 0 D.) 7x^4 +3x^3 -7x^2 +2x + 5 = 0

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