DAU COROANA URGENTT AM NEVOIE DE AJUTOR IN MAXIM 30 MIN VA ROG MACAR UN EX
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Y=4X-9
Inlocuim in a doua
3X+2(4X-9)=4
3X+8X-18=4
11X=22
X=22:11
X=2
ATUNCI
Y=4×2-9=-1