с * 5 + 2,859 = 3,454
с*5=3,454-2,859
с*5 = 0,595
с= 0,595 : 5
с=0,119
18,512 - а*3 = 17,732
а*3 = 18,512 - 17,732
а*3 = 0,78
а= 0,78 : 3
а=0,26
с * 5 + 2,859 = 3,454
с*5=3,454-2,859
с*5 = 0,595
с= 0,595 : 5
с=0,119
18,512 - а*3 = 17,732
а*3 = 18,512 - 17,732
а*3 = 0,78
а= 0,78 : 3
а=0,26
с*5=0.595
с=0.595/5
c=0.119
---
-а*3=17.732-18.512
-а*3=-0.78
-а=(-0.78)/3
-a=-0.26
а=0.26