1. 7^3-x-49^3-x=-4 2. 3(9^3x-1)-10(3^3x-1)+3=0
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1. 7^3-x-49^3-x=-4
2. 3(9^3x-1)-10(3^3x-1)+3=0
2. 3(9^3x-1)-10(3^3x-1)+3=0