Question

ex 48 va roggg e urgent ma abonez si dau coroana

Answer 1

x=y-10
(y+2x):(y-x)=6 rest r
(y+2y-20):(y-y+10)=6 rest r
(3y-20):10=6 rest r
Din teorema impartirii cu rest =>r<10 =>r={1,2,3,4,5,6,7,8,9}
I : 3y-20=60+1 =>3y=81 =>y=27 si x=17
II : 3y-20=60+2 =>3y=82 =>y=27,(3) si x=17,(3)
III : 3y-20=60+3 =>3y=83 =>y=27,(6) si x=17,(6)
IV : 3y-20=60+4 =>3y=84 =>y=28 si x=18
V : 3y-20=60+5 =>3y=85 =>y=28,(3) si x=18,(3)
VI : 3y-20=60+6 =>3y=86 =>y=28,(6) si x=18,(6)
VII : 3y-20=60+7 =>3y=87 =>y=29 si x=19
VIII : 3y-20=60+8 =>3y=88 =>y=29,(3) si x=19,(3)
IX : 3y-20=60+9 =>3y=89 =>y=29,(6) si x=19,(6)