Question

determinati perechile (x,y)de numere naturale care satisfac egalitatea; {25-3ori[2+(3+x):3]}ori{[6ori(y-2)-9]:3-4}=7

Answer 1

[25-3*(2+1+x/3)]*[(6y-12-9)/3-4=7
(25-6-x)*(2y-7-4)=7
(19-x)*(2y-11)=7
caz 1  19-x=7    ⇒x=12
           2y-11=1⇒y=6
caz 2 19-x=1  ⇒x=18
         2y-11=7  ⇒y=9
deci perechile sunt (12,6) si (18,9)