1)
{3x+3y=114,
{4x+2y=14;
{x+y=38,
{-2x-y=-7;
-x=31,
x=-31,
-31+y=38,
y=69.
2)
{(2x+3y)/4+(3x+2y)/5=-1/20,
{(3x+4y)/2-(5x-y)/3=43/6;
{5(2x+3y)+4(3x+2y)=-1,
{3(3x+4y)-2(5x-y)=43;
{10x+15y+12x+8y=-1,
{9x+12y-10x+2y=43;
{22x+23y=-1,
{-x+14y=43;
{-22x+308y=946;
331y=945,
y=945/331,
22x+23*945/331=-1,
22x=-22066/331,
x=1003/331.
1)
{3x+3y=114,
{4x+2y=14;
{x+y=38,
{-2x-y=-7;
-x=31,
x=-31,
-31+y=38,
y=69.
2)
{(2x+3y)/4+(3x+2y)/5=-1/20,
{(3x+4y)/2-(5x-y)/3=43/6;
{5(2x+3y)+4(3x+2y)=-1,
{3(3x+4y)-2(5x-y)=43;
{10x+15y+12x+8y=-1,
{9x+12y-10x+2y=43;
{22x+23y=-1,
{-x+14y=43;
{22x+23y=-1,
{-22x+308y=946;
331y=945,
y=945/331,
22x+23*945/331=-1,
22x=-22066/331,
x=1003/331.