Odpowiedź :
17y+28=19y+27
17y-19y = 27-28
-2y = -1|:(-2)
y = 1/2
spr:
17*1/2+28 = 19*1/2+27
8,5+28 = 9,5+27
36,5 = 36,5
17y-19y = 27-28
-2y = -1|:(-2)
y = 1/2
spr:
17*1/2+28 = 19*1/2+27
8,5+28 = 9,5+27
36,5 = 36,5