Tìm : x  79 - (x^2 +70 ) = 5 30 + x^3 = 34 5^3 + x = 60  1/4x + 2/3x - 25 = 13

Tìm : x  79 - (x^2 +70 ) = 5 30 + x^3 = 34 5^3 + x = 60  1/4x + 2/3x - 25 = 13
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