Question

i=7 c=9 restul=3 d=?      d=65 restul=5 c=10 i=?      d=94 i=6 restul=4 c=?

Answer 1

D=CXI+R⇒I=(D-R)/C⇒C=(D-R)/I

I=7 c=9 restul=3 d=9X7+3=66
d=65 restul=5 c=10 i=(65-5):10=60:10=6
d=94 i=6 restul=4 c=(94-4):6=90:6=15

Answer 2

d=cxI+r
d=9x7+3=63+3=66
65=10xI+5
60=10I
I=6
94=cx6+4
90=6c
c=15