We have
[tex]9x + 6y = - 3 - - - (1)[/tex]
and
[tex]x + 8y = 29 [/tex]
[tex] \rightarrow \: x = 29 - 8y - - - (2)[/tex]
Using elimination will be faster, so plug in equation (2) in equation (1)
[tex]9(29 - 8y) + 6y = - 3[/tex]
Expand brackets, we obtain,
[tex]261-72y+6y=-3[/tex]
Simplifying gives,
[tex]-66y=-264[/tex]
[tex]y = \frac{ - 264}{ - 66} = 4[/tex]
[tex]x = 29 - 8(4) = - 3[/tex]
