Răspuns :
a-b=47 b=a-47
a:b=3 si rest 7 a=3b+7 a=3(a-47)+7 a=3a-141+7 2a=134 a=67 b=67-47=20
a:b=3 si rest 7 a=3b+7 a=3(a-47)+7 a=3a-141+7 2a=134 a=67 b=67-47=20
a-b=47
a:b=3 rest 7 ⇔ a=3b+7
a=3(a-47)+7⇔a=3a-141+7⇔2a=134⇔a=134:2⇔a=67
b=67-47⇔b=20
a:b=3 rest 7 ⇔ a=3b+7
a=3(a-47)+7⇔a=3a-141+7⇔2a=134⇔a=134:2⇔a=67
b=67-47⇔b=20