Question 769999
so 1st lets solve the 2nd equation for y:

{{{-y = 6 - 3x}}}
{{{y = 3x - 6}}}

now we plug in for y in the 1st equation:

{{{9x - 2(3x - 6) = 3}}}

now we solve for x:
1st: Rewrite the expression: {{{9x - 6x + 12 = 3}}}
2nd: Combine like terms: {{{3x = -9}}}
{{{x = -3}}}

now going back to the 1st expression we can plug in -3 for x:
{{{y = 3(-3) - 6}}}
{{{y = -15}}}

so our final result is (-3, -15) which we can verify in both expressions:
{{{9(-3) - 2(-15) = 3}}} 
and
{{{3(-3) - (-15) = 6}}}