Răspuns :
x+257<261| - 257
x<4
x∈{..., 0, 1, 2, 3}
y-195<4| +195
y< 199
y∈{..., 195, 196, 197, 198}
493-z >485|-493
-z> -8| :(-1)
impartim la nr. negativ, deci schimbam sensul inecuatiei
z< 8
z∈{... 5, 6, 7}
x+257<261| - 257
x<4
x∈{..., 0, 1, 2, 3}
y-195<4| +195
y< 199
y∈{..., 195, 196, 197, 198}
493-z >485|-493
-z> -8| :(-1)
impartim la nr. negativ, deci schimbam sensul inecuatiei
z< 8
z∈{... 5, 6, 7}