1)8(х-1,4)=0,56
8х-11,2=0,56
8х=0,56+11,2
8х=11,76
х=11,76:8
х=1,47
2)(4,6-х)*19=4,18
87,4-19х=4,18
-19х=4,18-87,4
-19х=-83,22
х=-83,22:(-19)
х=4,38
3)(51,32+х)*0,12=72
51,32+х=72:0,12
51,32+х=600
х=600-51,32
х=548,68
4)17,28:(56-х)=38
56-х=17,28:38
56-х=0,45
х=56-0,45
х=55,55