Question

Dau coroana si 19 puncte!​

Answer 1

a:b=3 rest 7 => b>7  

a=3b+7  

3a:b=c rest 6

3a=b•c+6; il inlocuim pe a

3(3b+7)=b•c+6

9b+21=b•c+6

21-6=b•c-9b

15=b(c-9); b>7

=> b=15 si c-9=1; c=10

=> a=3•b+7=3•15+7=52

a=52=>3a=3•52=156

sau: 3a=b•c+6=15•10+6=156

R:   a=52 si b=15

verificare:

52:15=3 rest 7 (A)

156:15=10 rest 6  (A)