ma puteti ajuta la urmatorul ex/???
18x+6-3x-9=21-8x+20

dau coroana


Răspuns :

18x-3x+8x=21+20-6+9

16x+8x=41-6+9

24x=35+9

24x=44

x=44/24

X=11/6

18x-3x+8x=20-6+9
23X=23
X=23:23
X=1