## Answer :

[tex]2x+3=7 \ \ |-3\\ \\ 2x+3-3=7-3\\ \\2x=4 \ \ /:2 \\ \\x=2 \\ \\ \begin{cases} x=2 \\ y=1 \end{cases}[/tex]

x + y = 3

x = 3 - y

substituting for x,

2(3 - y) + 3y = 7

= 6 - 2y + 3y = 7

6 + y = 7

thus, y = 1

x = 3 - y

= 3 - 1

= 2.

Thus, x = 2 , y = 1

Thus, (2) is correct.