Practice Final Exam - Page 705: 29

$(7/2, -10)$

$x/2 + y/4 = -3/4$ $x+ 3/4*y = -4$ $x/2 + y/4 = -3/4$ $4*(x/2 + y/4) =4* -3/4$ $4x/2 + 4y/4 = -3*4/4$ $2x + y = -3$ $x+ 3/4*y = -4$ $4*(x+ 3/4*y) =4* -4$ $4x+3*4/4*y = -16$ $4x+3y=-16$ $2x + y = -3$ $4x+3y=-16$ $2x+y=-3$ $2x+y-2x=-3-2x$ $y=-3-2x$ $y=-3-2x$ $4x+3y=-16$ $4x+3*(-3-2x)=-16$ $4x-9-6x=-16$ $-2x-9+9=-16+9$ $-2x=-7$ $-2x/-2 = -7/-2$ $x=7/2$ $x+ 3/4*y = -4$ $7/2+ 3/4*y = -4$ $4x+3y=-16$ $4*7/2+3y=-16$ $28/2 +3y=-16$ $14+3y=-16$ $14+3y-14=-16-14$ $3y=-30$ $3y/3=-30/3$ $y=-10$