y = 3x - 8 ---- i
6x + 3y = -9
=>6x +3 (3x-8) = -9 (substituting y= 3x-8)
=> 6x + 9x - 24 = -9
=> 15x = 24 -9
=> 15x = 15
=> [tex]\red{\bold{\large{ x= 1}}}[/tex]
Now substituting x = 1 in equation i,
y = 3 × 1 -8
=> y = 3 -8
=> [tex]\red{\bold{\large{ y= -5}}}[/tex]
