2(1/4) * ( 16 - 9,12 : X ) + 2(8/15) = 4(1/3)
2(1/4) * ( 16 - 9,12 : X ) = 4 1/3 - 2 8/15 = 4 5/15 - 2 8/15 = 3(20/15) - 2(8/15) =
= 1 ( 12/15)
16 - 9,12 : X = 1(12/15) : 2(1/4) = 27/15 : 9/4 = 12/15
16 - 12/15 = 9,12 : X
15(15/15) - 12/15 = 9,12 : X
15(3/15) = 9,12 : X
15,2 = 9,12 : X
X = 9,12 : 15,2
X = 0,6