Răspuns :
a-b=47
a:b=3 rest 7
=> a=3b +7
3b+7-b=47
2b=47-7
2b=40
▪ b=20▪
▪ a=3×20+7=67▪
a:b=3 rest 7
=> a=3b +7
3b+7-b=47
2b=47-7
2b=40
▪ b=20▪
▪ a=3×20+7=67▪
a-b=47
a:b=3+r7 a=3b+7
3b+7-b=47
2b=47-7
b=40:2
b=20
a-b=47 a=47+20 a=67
proba 20*3=60+7=67