Question

\(\left\{{}\begin{matrix}2X-Y=3\\X+3Y=4\end{matrix}\right.\)

Giải hệ pt

Answer 1

x= 13/7  

y=5/7

Answer 2

`{(2x-y=3),(x+3y=4):}`

`<=>{(6x-3y=9),(x+3y=4):}`

`<=>{(7x=13),(x+3y=4):}`

`<=>{(x=13/7),(13/7+3y=4):}`

`<=>{(x=13/7),(y=5/7):}`

Answer 3

2x - y = 3

x + 3y = 4

 

6x - 3y = 9

x + 3y = 4

 

7x = 13

x + 3y = 4

 

x = 13/7

y = 5/7