2x+9y=-9 -3x+3y=8

2x+9y=-9 -3x+3y=8//-3 2x+9y=-9 x-y=-8/3 2x+9y=-9 x=y-2 i 1/3 2*(y-8/3)+9y=-9 x=y-2 i 1/3 2y-16/3 + 9y = -9 x=y-2 i 1/3 11y=16/3-9 x=y-2 i 1/3 11y = 5 i 1/3 -9 x=y-2 i 1/3 11y = -3 i2/3 x=y-2 i 1/3 11y = - 11/3 //11 x=y-2 i 1/3 y=-1/3 x=-1/3 - 2 i 1/3 y=-1/3 x=-2 i 2/3

2x + 9y= -9 -3x + 3y= 8 2x + 9y= -9 x - y = - 8/3 2x + 9y = -9 x= -8/3 + y 2 ( -8/3 + y) + 9y = -9 -16/3 + 2y + 9y= -9 11y= 5 i 1/3 - 9 11y= -3 i 2/3 / : 11 y= - 1/3 x= -8/3 + y x= -8/3 + (-1/3) x= -8/3 - 1/3= -9/3= -3

2x+9y=-9 -3x+3y=8 //*-3 2x+9y=-9 9x+-9y=-24 11x=-33 // /11 x=-3 x=-3 2x+9y=-9 x=-3 -6+9y=-9 x=-3 9y=-3 // /9 x=-3 y=-1/3