Question 1102999
1.{{{3x+7y=-33}}}
2.{{{2x-y=12}}}
From eq. 2,
{{{2x=12+y}}}
Multiplying by 3,
3.{{{6x=36+3y}}}
I'll call this equation 3.
Multiplying eq. 1 by 2 you get,
{{{6x+14y=-66}}}
Substituting from eq. 3,
{{{36+3y+14y=-66}}}
{{{17y=-102}}}
Solve for y and then use any of the equations to solve for x.