4,2x+8.4=14.7
4,2х=14,7-8,4
4,2х=6,3
х=6,3/4,2
х=1,5
0.39*x-0.01=0.16
0.39*x=0.16+0.01
0.39*x=0.17
x=0.17/0.39
х=0,43589743589
4,2x+8.4=14.7
4,2х=14,7-8,4
4,2х=6,3
х=6,3/4,2
х=1,5
0.39*x-0.01=0.16
0.39*x=0.16+0.01
0.39*x=0.17
x=0.17/0.39
х=0,43589743589