(19-7b)+(9b-8)при b=1;2

Question

(19-7b)+(9b-8)при b=1;2

Answer 1

(19 -7b) + (9b-8) b=1;2
(19-7*1) + (9*2-8)= (19-7) + (18-8)=12+10=22

Answer 2

(19-7b)+(9b-8)=19-7b+9b-8=11+2b при b=1
11+2*1=13
при b=2
11+2*2=15