Question

Afla numerele necunoscute a:3=15 rest 2 b:7=9 rest 5 cx15=60 5xd=95 e:21=3 rest 4 (f-2):13=rest 4

Answer 1

a:3=15 r 2
a=3*15+2
a=45+2
a=47

b:7=9 r 5
b=7*9+5
b=63+5
b=68

c*15=60
c=60:15
c=4
4*15=60

5*d=95
d=95:5
d=19
5*19=95

e:21=3 r 4
e=3*21+4
e=63+4
e=67

(f-2):13= c r 4
f-2=13*c+4
f=13c+4+2