X+5/12)-9/20=11/15 скажите пж!!!!!!!!
(x+ 5/12) -9/20=11/15
x+5/12 = 11/15+ 9/20 ( 11/15 + 9/20 = 44/60 + 27/60 = 71/60 )
x+ 5/12 = 71/60
x = 71/60 - 5/12 = 71/60 - 25/60 = 46/60 = 23/30
x = 23/30