Question

19,8y-12,6y+3,1y при y=2,1
2 пожалуйста

Answer 1

2)  

y(19,8-12,6+3,1) +4,37 = 10,3 y +4,37  = 10,3*2,1+4,37=

=21,63+4,37=26

Answer 2

1) 19.8*2.1 = 41.58
2) -12.6*2.1 = -26.46
3) 3.1*2.1 = 6.51
4) 41.58 + (-26.46) = 41.58 -26.46= 15.12
5) 15.12+4.37 = 19.49
6) 19.49 + 6.51 = 26