1)4 5/14+(5 1/12-3 4/12)=61/14+(61/12-40/12)=61/14+21/12=732/168+294/168=
=1026/168=6 18/168=6 3/28
2)8 9/26-z=5 7/39
217/26-z=202/39
z=217/26-202/39
z=247/78=3 13/78=3 1/6
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1)4 5/14+(5 1/12-3 4/12)=61/14+(61/12-40/12)=61/14+21/12=732/168+294/168=
=1026/168=6 18/168=6 3/28
2)8 9/26-z=5 7/39
217/26-z=202/39
z=217/26-202/39
z=247/78=3 13/78=3 1/6
0,4x-0,2+5-2x+1=0
-1,6x+5,8=0
-1,6x=-5,8
x= -5,8:(-1,6)
x=3,625