Question 62669
Given y = 3x + 11

3x + 3y = 0

Plugging in y = 3x + 11 in the above we get,

3x + 3(3x+11) = 0

==> 3x + 9x + 33 = 0

==> 12x + 33 = 0

==> 12x + 33 - 33 = 0 - 33

==> 12x = - 33

==> 12x/12 = - 33/12

==> x = -11/4

So y = 3(-11/4) + 11

     = -33/4 + 11

     = (-33+44)/4  [taking LCD and adding]

     = 11/4

x = - 11/4 and y = 11/4



Good Luck!!!