Question

Determinati nr nat care:
au suma 103 catul 4 si rest 3
au suma 260 catul 5 si restul 2
au suma 238 catul 7 si restul 6
au diferenta 70 catul 5 si restul2
au diferenta 129 cataul 7 si restul 3
RApid!!

Answer 1

a+b=103
a;b=4+r3      a=4b+3
4b+3+b=103
5b=103-3
b=100:5=20
a=4*20+3=80+3=83

a+b=260
a:b=5+r2     a=5b+2
5b+2+b=260
6b=260-2
b=258;6=43
a=5*43+2=215+2=217

a-b=70
a;b=5+r2    a=5b+2
5b+2-b=70
4b=70-2
b=68:4=17
a=2*17+2=85+2=87