(x-9):(3x+6) is the triplicate ratio of 4:9 find x.
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x-9 : 3x + 6 is the triplicate ratio of 4 : 9.
hence, 4^3:9^3 = x-9:3x+6
that is,
64/729 = x-9 / 3x + 6
ie,
192x + 384 = 729x - 6561
537x = 6945
therefore x = 6945/537
hence x = 2315/179
hence, 4^3:9^3 = x-9:3x+6
that is,
64/729 = x-9 / 3x + 6
ie,
192x + 384 = 729x - 6561
537x = 6945
therefore x = 6945/537
hence x = 2315/179
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