Question

determinati numerele naturale a si b astfel incat a supra 3 -bsupra12=11supra 15-3supra 20

Answer 1

a/3-b/12=11/15-3/20
4a/12-b/12=44/60-9/60
4a-b/12= 35/60
4a-b/12=7/12⇒ 4a-b=7⇒ 4a = b+7
a=2⇒ b=1
a=3⇒b=5
a=4⇒b=9