б) 2/5d+3/10d-2/15d= 1/6 = 12d+9-4d= 5 =
d= 5/17.
в) 4/15:n=2/5. =4/15n= 2/5= 20n=30n =
n= 2/3.
г) 2/3z+5/6z-7/9z=1/2 = 12z+15z-14z=9 = 13z=9
z= 9/13.
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б) 2/5d+3/10d-2/15d= 1/6 = 12d+9-4d= 5 =
d= 5/17.
в) 4/15:n=2/5. =4/15n= 2/5= 20n=30n =
n= 2/3.
г) 2/3z+5/6z-7/9z=1/2 = 12z+15z-14z=9 = 13z=9
z= 9/13.