Question

100-(b*8-50)=30

9600: (540:d-4) = 600

Answer 1

100-(b*8-50)=30
b*8-50=100-30
b*8-50=70
b*8=50+70
b*8=120
b=120:8
b=15
9600:(540:d-4)=600
540:d-4=9600:600
540:d-4=16
540:d=16+4
540:d=20
d=540:20
d=27

Answer 2

пепец

Answer 3

что?