Which expression is not equivalent to the other expressions? -6(2 x - 4) -4(3 x + 6) -(12 x - 6) + 18 -3(4 x - 3) + 15 why did it not give me my answer

Planet earth has a mass of 5.9726x10²⁴ kg.then: 5.9726x10²⁴ kg=100% of the total earth mass.if the water´s mass=5x10-4 % of the total mass, we can solve this problem by the rule of three.5.9726x10²⁴ %*10⁻⁴ %x=(5.9726x10²³ kg)(5*10⁻⁴  %) / 100 %=2.9863x10¹⁹ kganswer:   the mass of the planet´s water would be   2.9863 x 10¹⁹ kg.

You need to use the logical equivalence lawsin this problem you have to use definition of implication(~p v q)i hope this