Question

9,7b - 5,8 + 4,1b при b = 1,5
2,9c + 6,3c - 4,2c при с = 1,2

Answer 1

1) =13,9b-5,8
b=1,5. 13,8*1,5-5,8=20,7-5,8=14,9.
2) =5c
c=1,2. 5*1,2=6.