16.05х+1.8x=3.63-0.3x 17х-2. 6=3 (0. 8+3х) 8+5. 1х=49 (1+0. 1х)

16.05х+18х+0.3х=3.63   
18.15х=3.63
х=3.63/18.15
х=0.2
2) 17х-2.6=2.4+9х
17х09х=2.4+2.6
8х=5
х=5/8
х=0.685
3)8+5.1х=49+4.9х
5.1х-4.9х=49-8
0.2х=41
х=41/0.2
х=205