👤

2(x+3y)=5 -x-2y=6 sistem de ecuatii va rog

Răspuns :

2(X+3Y) = 5 2X + 6Y = 5
-X-2Y = 6 -X - 2Y = 6 |×2


2X + 6Y = 5
-2X -4Y = 12
___________( + )
// 2Y = 17 => Y = 17/2= 8,5

2X + 6×17/2=5
2X+ 3×17=5
2X+ 51=5
2X= 5-51
2X= - 46 |:2
X= -23
Y= 8,5