(x+19,64)*0,18=144, 17(1,6-5x)=2,38, 9,66: (x+0,17)=23. !

0,18х+19,64*0,18=144
0,18х+21,535=144
0,18х=144-21,535
0,18х=122,465
х=680,361

17*1,6-17*5,х=2,38
27,2-85х=2,38
-85х=2,38-27,2
-85х=-24,82
х=0,292

9,66х+9,66*0,17=23
9,66х+1,6422=23
9,66х=23-1,6422
х=21,35/9,66
х=2,211