Question

determinati cifra x pt care urmatoarele propozitii sunt adevarate:

Answer 1

a)44x|10<=>x=0
b)88x|3<=>(8+8+x)|3=>((16+x)|3=>x=2;5;8
c)29x|5<=>x=0;5
d)65xx|2<=>x=0;2;4;6;8
e)30x|9<=>(3+0+x)|9<=>(3+x)|9<=>x=3
f)407x|3<=>(4+7+x)|3<=>(11+x)|3<=>x=4;7
g)100|780x<=>x=0
h)45x2|9<=>(4+5+x+2)|9<=>(11+x)|9<=>x=7