👤

rezolvati sistemul de ecuati 4(2x+1)+9y=38 si (2x+1)-3y= -1


Răspuns :

Ai raspuns in atașament
Vezi imaginea ALEXA3000

4(2X+1)+9Y=38

(2X+1)-3Y= -1


8X+4+9Y=38

2X+1-3Y=-1|*3


8X+4+9Y=38

6X+3-9Y=-3

________"+"

14X+7=35<=>14X=35-7<=>14X=28=>X=28/14=>X=2

X=2

6X+3-9Y=-3<=>6*2-9Y=-6<=>-9Y=-6-12<=>-9Y=-18=>Y=18/9=>Y=2

Y=2